CA1210454A - Vision obstructing shield for electric meters - Google Patents
Vision obstructing shield for electric metersInfo
- Publication number
- CA1210454A CA1210454A CA000402912A CA402912A CA1210454A CA 1210454 A CA1210454 A CA 1210454A CA 000402912 A CA000402912 A CA 000402912A CA 402912 A CA402912 A CA 402912A CA 1210454 A CA1210454 A CA 1210454A
- Authority
- CA
- Canada
- Prior art keywords
- meter
- shield
- globe
- read
- measuring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
VISION OBSTRUCTING SHIELD FOR ELECTRIC METERS
ABSTRACT OF THE DISCLOSURE:
A vision obstructing protective shield for electric meters comprising an opaque structure adapted to be con-tained within, or to surround and enclose the globe on an electric meter; said structure having a light trans-mitting passage such as an aperture or a window for permitting reading of the dials on the meter, and baffled or positioned to prevent the visual inspection of any portion of a geared element within the meter.
ABSTRACT OF THE DISCLOSURE:
A vision obstructing protective shield for electric meters comprising an opaque structure adapted to be con-tained within, or to surround and enclose the globe on an electric meter; said structure having a light trans-mitting passage such as an aperture or a window for permitting reading of the dials on the meter, and baffled or positioned to prevent the visual inspection of any portion of a geared element within the meter.
Description
~ Docket No, ~211fJ - 1 ~Zl(~454 VISION OBSTRUCTING SHIELD FOR ELECTRIC METERS
BACKGROUND OF THE INVENTION:
Electric utility companies meter, through a company owned meter, the electrical energy furnished to each user.
Care has been exercised in the design and mounting of these service meters to make it as difficult as possible for a user to thwart or cheat the meter, or,in other words, to steal electrical energy.
In spite of the safeguards, millions of dollars worth of electrical energy is stolen each year. The problem is becoming more and more acute as the rates increase and become more burdensome to more and more users.
The inventors have discovered a method by which elec-trical energy may be stolen without the use of wire taps, and without leaving any telltale evidence. Obviously the inventors will not disclose their precise method to the public because such disclosure would reveal a simple method for commission of the illegal act of bilking utility companies.
The inventors did demonstrate to a utility company to its satisfaction that electrical energy could be stolen very easily and without leaving any telltale evidence of such theft other than that the user will have an unusually low bill. One of the inventors used a full month of elec-trical energy at his residence without anything showing on -~ ' Docket ~lu. ~2116 - 2 ~2~5~
the meter, and without leaving a trace of ellidence that electrical energy was flowing through the sealed meter which was not recording the flow.
There are several major meter manufacturers in the United States, and all manufacturers have produced mil-lions of meters which have -the same latent defect.
This defect was brought to the attention of one manu-facturer which paid a monetary award under a written agreement under which the inventors agreed not to reveal their method of thwarting the meter to the public, for obvious reasons. This manufacturer remedied the defect by design changes, and the new meters cannot be foiled by the inventors' method.
The problem is with the estimated 200 million or more existing meters, being used in the United States and Canada alone, which can be thwarted by the inventor's method. These meters could be taken out of service to be rebuilt and reinstalled. In addition to other costs to the meter manufacturers and utility companies, the cost of rebuilding each meter approaches the cost of building a new meter.
Without revealing how it is done, i-t can be stated that it is necessary to stop the clockwork within the sealed meter for as long as desired, and to restart the clockwork at a selected future time. This can be done - Docket ~lo, ~ J - ', without jumper wires, without breaking a seal, and witn-out leaving any telltale evidence. Stopping the clock-work has no effect on the flow of electricity through the meter. Unless the utility's meter reader or an inspector notices that the clockwork is not operating, he will not even suspect that the meter is not recording the energy flowing through the meter.
In order to know when the meter is made inoperative to record the energy flow, it is necessary to observe movement somewhere in the gear train. The same is also true when again starting the recorder. Without this visual observation, anyone tampering with the meter would not know until the lapse of several hours whether the recorder was operative or was non-operative. The only element in the gear train which will give a fast indication is the large horizontal registering ratio calibrating disc which is driven by a magnetic field.
- - Dock~t iNo. X2116 - 4 SUMMARY OF THE INVENTION ~Z1~4~4 In one broad aspect, the present invention relates to a shield for an electric meter mounted to a base to complete and form part of a circuit making available a supply of electricity to a home, business or the like, which meter comprises means for measuring the rate of flow therethrough of electricity and providing a calibrated transmission thereo to visual read out means embodied therein, said shield comprising a globe-like structure having an opening by means of which it may be applied over and about said meter, means bounding said opening by means of which said structure may have a sealed connection thereof to the meter base and a seal of said opening, said globe-like structure being formed to preclude access to or visual observation of said means for rneasuring and providing said calibrated transmission of the rate of flow of electricity and a limited portion of said structure being arranged to provide means for a restricted visual observation o~ said read-out means.
The outer closed end of the shield is provided with a suitable aperture or a transparent window through which the dials on the meter may be read. The aperture or window should be as small as possible, and on most meters will require a suitable baffle to prevent observation of even a portion of a geared element within the meter, and in particular the registering ratio calibrating disc. The baffle must also provide protection against use of a small mirror, such as is used by dentists. The specific details of the shield should be tailored for a specific meter and meter socket combination.
, ,~
Docket No. ~2116 - ~
5~
BRIEF DESCRIPTION OF THE DRAWINGS:
Fig. 1 is an exploded perspective depicting a con-ventional meter mounted on an open meter socket, a shield in accordance with the present invention, and a locking cover;
Fig. 2 are the components of Fig. 1 in their assembled position;
Fig. 3 is an enlarged vertical section taken along the lines 3 - 3 and depicting one manner of limiting the line of sight permitted by the shield of the present invention;
Fig. 4 is a fragmentary section comparable to the vertical section of Fig, 3 and depicting an alternate method of limiting the line of sight;
Fig. 5 is a fragmentary section comparable to the vertical section of Fig. 3 and depicting yet another alternate method of limiting the line of sight;
Fig. 6 is a fragmentary section comparable to the vertical section of Fig. 3 and depicting still another alternate method of limiting the line of sight by using a small window in the end of -the shield; and, Fig. 7 is a fragmentary section comparable to Fig. 6 and having an open aperture in the end of the shield.
~ocket 1'lO. ~21L6 - 6 45~
DESCRIPTION OF THE PREFERRED EMBODIMENT:
Fig. 1 depicts one of several types of standard meter sockets 5 such as are used by all electrical utility com-panies. Standard meters, of which meter 7 is an example, are provided with male prongs which engage sockets in the meter socket 5. The meter socket is provided with a hinged cover 9 which is closed when the meter is in place, and is locked or sealed in place by the utility at the time of meter installation. The meter is provided with a flange to prevent removal of the meter when the hinged cover is secured in place.
The present invention consists of a shield 10 which slips over the transparent glass globe which extends from the installed meter. The shield is provided with a flange retaining means comparable to the flange on the meter, and when the cover 9 is closed, the cover prevents removal of both the shield and the meter. When the cover 9 is closed against the flange on the shield, the shield is gripped very tightly, and the shield cannot be rotated on the meter. However, and if desired, the shield may be provided with additional means for preventing rotation of the shield in its mounted position on the meter socket.
Such non-rotatable retention means are well known in the art and require no further description.
The shield may be made of any material which will blur or obstruct the vision sufficiently to prevent observation ` ~ocket ~lo. ~211~) 7 ::~2~L~r45j~
of movement within the meter. The ideal material is very dark or opaque plastic material or fiberglass which will permit the injection molding of the shields.
The shield 10 is provided with a light transmitting passage such as a window 12 which is best shown in Fig. 3.
The window may be made of a transparent material such as glass or clear plastic material, and positioned in the shield to permit reading of the dials on the meter. As shown in Figs. 1 - 3, the shield is provided with an external hood 14 positioned to be at the top portion of the shield, and extending outwardly a sufficient distance to prevent the external observation of any po}tion of the registering ratio calibra,ting disc 16 within the meter.
If desired, the window 12 may be omitted to leave an aperture for reading the dials on the meter. When using an aperture through which a small mirror may be manipulated, the shield should be provided with a suitable internal baffle 18 to block viewing the front portion of the regis-tering ratio calibrating disc 16 by use of a mirror.
Fig. 4 depicts a modification of the shield 10. The closed end of the modified shield 20 has an aperture formed by inwardly extending walls 22 which support a transparent cupped window 24. As depicted, the flange or rim of the cupped window prevents outward movement of the window, and - the window is restrained from inward movement by resting Docket No. X2116 - ~
~2~5~
against the globe of the meter 7. The walls 2~, being made of opaque material, will prevent the use of a mir-ror device for observing any movement of the ratio calibrating disc 16.
Fig. 5 depicts a second modification of the shield lO.
The closed end of the modified shield 30 has an aperture formed by inwardly extending walls 32 terminating at the inner end in an angular flange as indicated. A transparent window 34 is provided with conventional retaining tabs which snap aroundthe flange on the walls 32 and hold the window in place.
On the modifications depicted by Figs. 4 and 5, internal baffles are not required because the opaque walls supporting the windows act as baffles. Furthermore, the windows prevent insertion of a mirror.
Fig. 6 depicts yet another modification of the shield lO.
The closed end of modified shield 40 contains a transparent window 42 which may be made to be integrally located in the closed end of the shield at the time the shield is injection molded. If desired, the shield may be provided with an inter-nal baffle 44.
Fig. 7 depicts still another modification of the shield lO.
The closed end of the modified shield 50 contains an aperture 52 through which the dials of the meter 7 may be read. Since a mirror may be manipulated through the aperture 52, an internal baffle 54 should be provided.
~ Docket ~lo, ~211~
54~
All the shields should be provided with a drain aperture at the bottom of the shield to prevent any possible accumulation oE water within the shield.
Although some elements of meters have been standardized to permit interchangability of meters made by various manufacturers,there is some variation in the location of dials and other meter elements. For this reason shields should be configured to fit specific meter applications.
This also applies to baffles which may or may not be re-quired in any particular application.
On many types of meters, a shield, especially the species depicted in Fig. 7, may be used inside the globe of the meter as easily as on the outside of the globe. The baffle 54 would fi-t against the face of the recording mechanism through which the dial shafts pass, and would effectively prevent observation of the registering ratio calibrating disc 16. The internal shield could be instal-led at the usage site by pulling the meter, removing the glass globe, inserting the shield inside the globe, and then reinstalling the meter. A shield for internal use need not be as heavy as a shield for external use. Such a shield may be made from heavy opaque paper since it is not exposed to the elements or to vandalism. A shield for internal use would have the same configuration as the shield depicted in Fig. 7, except that it is slightly smaller to fit the inside of the globe.
Docket ~lo. 8Zll~ - lr~
~LZ~
The use of a shield in accordance with the present invention is not a certain cure or a remedy which will prevent the bilking of an electric utility. However, it does provide a very effective deterrent which will make such bilking very much more difficult. Since it is necessary to see whether or not meter elements are moving in order to know whether or not the meter is registering, the cheat will not know whether or not he has stopped the meter, or whether or not he has again started the meter at a future time. A utility inspector can break ~he seal, slip off the shield, and can then readily determine whether or not the utility is being bilked at that particular time.
It is to be understood that the embodiments of the present invention as shown and described are to be regarded merely as illustrative, and that the invention is susceptible to variations, modifications and changes, without regard to specific construction methods, within the scope of the appended claims.
BACKGROUND OF THE INVENTION:
Electric utility companies meter, through a company owned meter, the electrical energy furnished to each user.
Care has been exercised in the design and mounting of these service meters to make it as difficult as possible for a user to thwart or cheat the meter, or,in other words, to steal electrical energy.
In spite of the safeguards, millions of dollars worth of electrical energy is stolen each year. The problem is becoming more and more acute as the rates increase and become more burdensome to more and more users.
The inventors have discovered a method by which elec-trical energy may be stolen without the use of wire taps, and without leaving any telltale evidence. Obviously the inventors will not disclose their precise method to the public because such disclosure would reveal a simple method for commission of the illegal act of bilking utility companies.
The inventors did demonstrate to a utility company to its satisfaction that electrical energy could be stolen very easily and without leaving any telltale evidence of such theft other than that the user will have an unusually low bill. One of the inventors used a full month of elec-trical energy at his residence without anything showing on -~ ' Docket ~lu. ~2116 - 2 ~2~5~
the meter, and without leaving a trace of ellidence that electrical energy was flowing through the sealed meter which was not recording the flow.
There are several major meter manufacturers in the United States, and all manufacturers have produced mil-lions of meters which have -the same latent defect.
This defect was brought to the attention of one manu-facturer which paid a monetary award under a written agreement under which the inventors agreed not to reveal their method of thwarting the meter to the public, for obvious reasons. This manufacturer remedied the defect by design changes, and the new meters cannot be foiled by the inventors' method.
The problem is with the estimated 200 million or more existing meters, being used in the United States and Canada alone, which can be thwarted by the inventor's method. These meters could be taken out of service to be rebuilt and reinstalled. In addition to other costs to the meter manufacturers and utility companies, the cost of rebuilding each meter approaches the cost of building a new meter.
Without revealing how it is done, i-t can be stated that it is necessary to stop the clockwork within the sealed meter for as long as desired, and to restart the clockwork at a selected future time. This can be done - Docket ~lo, ~ J - ', without jumper wires, without breaking a seal, and witn-out leaving any telltale evidence. Stopping the clock-work has no effect on the flow of electricity through the meter. Unless the utility's meter reader or an inspector notices that the clockwork is not operating, he will not even suspect that the meter is not recording the energy flowing through the meter.
In order to know when the meter is made inoperative to record the energy flow, it is necessary to observe movement somewhere in the gear train. The same is also true when again starting the recorder. Without this visual observation, anyone tampering with the meter would not know until the lapse of several hours whether the recorder was operative or was non-operative. The only element in the gear train which will give a fast indication is the large horizontal registering ratio calibrating disc which is driven by a magnetic field.
- - Dock~t iNo. X2116 - 4 SUMMARY OF THE INVENTION ~Z1~4~4 In one broad aspect, the present invention relates to a shield for an electric meter mounted to a base to complete and form part of a circuit making available a supply of electricity to a home, business or the like, which meter comprises means for measuring the rate of flow therethrough of electricity and providing a calibrated transmission thereo to visual read out means embodied therein, said shield comprising a globe-like structure having an opening by means of which it may be applied over and about said meter, means bounding said opening by means of which said structure may have a sealed connection thereof to the meter base and a seal of said opening, said globe-like structure being formed to preclude access to or visual observation of said means for rneasuring and providing said calibrated transmission of the rate of flow of electricity and a limited portion of said structure being arranged to provide means for a restricted visual observation o~ said read-out means.
The outer closed end of the shield is provided with a suitable aperture or a transparent window through which the dials on the meter may be read. The aperture or window should be as small as possible, and on most meters will require a suitable baffle to prevent observation of even a portion of a geared element within the meter, and in particular the registering ratio calibrating disc. The baffle must also provide protection against use of a small mirror, such as is used by dentists. The specific details of the shield should be tailored for a specific meter and meter socket combination.
, ,~
Docket No. ~2116 - ~
5~
BRIEF DESCRIPTION OF THE DRAWINGS:
Fig. 1 is an exploded perspective depicting a con-ventional meter mounted on an open meter socket, a shield in accordance with the present invention, and a locking cover;
Fig. 2 are the components of Fig. 1 in their assembled position;
Fig. 3 is an enlarged vertical section taken along the lines 3 - 3 and depicting one manner of limiting the line of sight permitted by the shield of the present invention;
Fig. 4 is a fragmentary section comparable to the vertical section of Fig, 3 and depicting an alternate method of limiting the line of sight;
Fig. 5 is a fragmentary section comparable to the vertical section of Fig. 3 and depicting yet another alternate method of limiting the line of sight;
Fig. 6 is a fragmentary section comparable to the vertical section of Fig. 3 and depicting still another alternate method of limiting the line of sight by using a small window in the end of -the shield; and, Fig. 7 is a fragmentary section comparable to Fig. 6 and having an open aperture in the end of the shield.
~ocket 1'lO. ~21L6 - 6 45~
DESCRIPTION OF THE PREFERRED EMBODIMENT:
Fig. 1 depicts one of several types of standard meter sockets 5 such as are used by all electrical utility com-panies. Standard meters, of which meter 7 is an example, are provided with male prongs which engage sockets in the meter socket 5. The meter socket is provided with a hinged cover 9 which is closed when the meter is in place, and is locked or sealed in place by the utility at the time of meter installation. The meter is provided with a flange to prevent removal of the meter when the hinged cover is secured in place.
The present invention consists of a shield 10 which slips over the transparent glass globe which extends from the installed meter. The shield is provided with a flange retaining means comparable to the flange on the meter, and when the cover 9 is closed, the cover prevents removal of both the shield and the meter. When the cover 9 is closed against the flange on the shield, the shield is gripped very tightly, and the shield cannot be rotated on the meter. However, and if desired, the shield may be provided with additional means for preventing rotation of the shield in its mounted position on the meter socket.
Such non-rotatable retention means are well known in the art and require no further description.
The shield may be made of any material which will blur or obstruct the vision sufficiently to prevent observation ` ~ocket ~lo. ~211~) 7 ::~2~L~r45j~
of movement within the meter. The ideal material is very dark or opaque plastic material or fiberglass which will permit the injection molding of the shields.
The shield 10 is provided with a light transmitting passage such as a window 12 which is best shown in Fig. 3.
The window may be made of a transparent material such as glass or clear plastic material, and positioned in the shield to permit reading of the dials on the meter. As shown in Figs. 1 - 3, the shield is provided with an external hood 14 positioned to be at the top portion of the shield, and extending outwardly a sufficient distance to prevent the external observation of any po}tion of the registering ratio calibra,ting disc 16 within the meter.
If desired, the window 12 may be omitted to leave an aperture for reading the dials on the meter. When using an aperture through which a small mirror may be manipulated, the shield should be provided with a suitable internal baffle 18 to block viewing the front portion of the regis-tering ratio calibrating disc 16 by use of a mirror.
Fig. 4 depicts a modification of the shield 10. The closed end of the modified shield 20 has an aperture formed by inwardly extending walls 22 which support a transparent cupped window 24. As depicted, the flange or rim of the cupped window prevents outward movement of the window, and - the window is restrained from inward movement by resting Docket No. X2116 - ~
~2~5~
against the globe of the meter 7. The walls 2~, being made of opaque material, will prevent the use of a mir-ror device for observing any movement of the ratio calibrating disc 16.
Fig. 5 depicts a second modification of the shield lO.
The closed end of the modified shield 30 has an aperture formed by inwardly extending walls 32 terminating at the inner end in an angular flange as indicated. A transparent window 34 is provided with conventional retaining tabs which snap aroundthe flange on the walls 32 and hold the window in place.
On the modifications depicted by Figs. 4 and 5, internal baffles are not required because the opaque walls supporting the windows act as baffles. Furthermore, the windows prevent insertion of a mirror.
Fig. 6 depicts yet another modification of the shield lO.
The closed end of modified shield 40 contains a transparent window 42 which may be made to be integrally located in the closed end of the shield at the time the shield is injection molded. If desired, the shield may be provided with an inter-nal baffle 44.
Fig. 7 depicts still another modification of the shield lO.
The closed end of the modified shield 50 contains an aperture 52 through which the dials of the meter 7 may be read. Since a mirror may be manipulated through the aperture 52, an internal baffle 54 should be provided.
~ Docket ~lo, ~211~
54~
All the shields should be provided with a drain aperture at the bottom of the shield to prevent any possible accumulation oE water within the shield.
Although some elements of meters have been standardized to permit interchangability of meters made by various manufacturers,there is some variation in the location of dials and other meter elements. For this reason shields should be configured to fit specific meter applications.
This also applies to baffles which may or may not be re-quired in any particular application.
On many types of meters, a shield, especially the species depicted in Fig. 7, may be used inside the globe of the meter as easily as on the outside of the globe. The baffle 54 would fi-t against the face of the recording mechanism through which the dial shafts pass, and would effectively prevent observation of the registering ratio calibrating disc 16. The internal shield could be instal-led at the usage site by pulling the meter, removing the glass globe, inserting the shield inside the globe, and then reinstalling the meter. A shield for internal use need not be as heavy as a shield for external use. Such a shield may be made from heavy opaque paper since it is not exposed to the elements or to vandalism. A shield for internal use would have the same configuration as the shield depicted in Fig. 7, except that it is slightly smaller to fit the inside of the globe.
Docket ~lo. 8Zll~ - lr~
~LZ~
The use of a shield in accordance with the present invention is not a certain cure or a remedy which will prevent the bilking of an electric utility. However, it does provide a very effective deterrent which will make such bilking very much more difficult. Since it is necessary to see whether or not meter elements are moving in order to know whether or not the meter is registering, the cheat will not know whether or not he has stopped the meter, or whether or not he has again started the meter at a future time. A utility inspector can break ~he seal, slip off the shield, and can then readily determine whether or not the utility is being bilked at that particular time.
It is to be understood that the embodiments of the present invention as shown and described are to be regarded merely as illustrative, and that the invention is susceptible to variations, modifications and changes, without regard to specific construction methods, within the scope of the appended claims.
Claims (14)
1. A shield for an electric meter mounted to a base to complete and form part of a circuit making available a supply of electricity to a home, business or the like, which meter comprises means for measuring the rate of flow therethrough of electricity and providing a calibrated transmission thereof to visual read out means embodied therein, said shield comprising a globe-like structure having an opening by means of which it may be applied over and about said meter, means bounding said opening by means of which said structure may have a sealed connection thereof to the meter base and a seal of said opening, said globe-like structure being formed to preclude access to or visual observation of said means for measuring and providing said calibrated transmission of the rate of flow of electricity and a limited portion of said structure being arranged to provide means for a restricted visual observation of said read out means.
2. A shield as in claim 1 characterized in that said means bounding said opening is arranged for a non-rotative connection thereof to the meter base on the application of said globe-like structure over and about the meter.
3. A shield as in claim 1, for application to a meter capped by a transparent globe, characterized in that said globe-like structure is applied external to and immediately about said transparent globe.
4. A shield as in claim 1, for application to a meter capped by a transparent globe, characterized in that said globe-like structure is positioned within and so formed as to be complementary to said transparent globe.
5. A shield as in claim 4 characterized in that said globe-like structure is made of heavy opaque paper.
6 A shield as in claim 3 wherein said limited portion of said globe-like structure has an aperture therein to provide for said restricted visual observation of said read-out means.
7. A shield as in claim 6 wherein a surface portion of said globe-like structure adjacent said aperture is so formed as to inhibit access to said means for measuring and providing calibrated transmission of the rate of flow of electricity to said read-out means on the application of said structure over and about the meter.
8 A shield as in claim 1 wherein said limited portion of said globe-like structure has an aperture therein to provide for said restricted visual observation of said read-out means.
9 A shield as in claim 8 wherein a surface portion of said globe-like structure adjacent said aperture is so formed as to inhibit access to said means for measuring and providing calibrated transmission of the rate of flow of electricity to said read-out means on the application of said structure over and about the meter,
10. A shield as in claim 1 characterized in that said globe-like structure is formed of materials which render it opaque and said limited portion thereof is transparent and angularly inclined with respect to a vertical plane to preclude visual observance therethrough of the measuring and calibrating means within the meter.
11. A shield as in claim 1 wherein said globe-like structure is formed of essentially opaque material, said limited portion of said structure provides a light transmitting passage to permit the observation of said read-out means and said globe-like structure is constructed and arranged to provide an outwardly projected hood immediately of said light transmitting passage which serves further to prevent the observation by way of said passage of any portion of said measuring and calibrating means within the meter to which the shield is applied.
12. A shield as in claim 1 wherein said globe-like structure is formed of essentially opaque material and said limited portion of said structure is constructed and arranged to provide a light transmitting passage which permits an observation of the meter limited to its read-out means and said globe-like structure has an internal projection immediately of said passage precluding access through said passage to said measuring and calibrating means within the meter to which the shield is applied.
13. A shield as in claim 1 wherein the portion of said globe-like structure remote from and generally opposite to said opening incorporates said limited portion, which mounts therein a relatively recessed window for the observation of the meter read-out means and the position of said window in the application of said structure to the base of the meter to which it is applies is arranged to essentially restrict the observer's view to the meter read-out means.
14. A shield as in claim 13 wherein said window is angularly inclined to further preclude access to and observation of the measuring and calibrating means of the meter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US26441481A | 1981-05-18 | 1981-05-18 | |
| US264,414 | 1988-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1210454A true CA1210454A (en) | 1986-08-26 |
Family
ID=23005978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000402912A Expired CA1210454A (en) | 1981-05-18 | 1982-05-13 | Vision obstructing shield for electric meters |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1210454A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020329A (en) * | 2014-05-09 | 2014-09-03 | 国家电网公司 | Electric meter box |
-
1982
- 1982-05-13 CA CA000402912A patent/CA1210454A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020329A (en) * | 2014-05-09 | 2014-09-03 | 国家电网公司 | Electric meter box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |