CA2491597A1 - Distance measuring device with laser indicating device - Google Patents
Distance measuring device with laser indicating device Download PDFInfo
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- CA2491597A1 CA2491597A1 CA 2491597 CA2491597A CA2491597A1 CA 2491597 A1 CA2491597 A1 CA 2491597A1 CA 2491597 CA2491597 CA 2491597 CA 2491597 A CA2491597 A CA 2491597A CA 2491597 A1 CA2491597 A1 CA 2491597A1
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Abstract
A distance measuring device is provided that measures the distance to an object surface. The distance measuring device includes a housing, a measuring signal projecting and detecting means, a laser indicating device, a display, a circuit, a series of battery cells, a switch and plurality of operation buttons. The measuring signal projecting and detecting means emits a signal to an object surface and detects the reflected signal therefrom. The laser indicating device projects at least one laser beam onto a surface to form at least one visible reference line vertical to the direction in which said measuring signal is emitting. And, the circuit calculates the distance between the laser beam and the object surface.
Description
Attorney Docket No. 4386 P 03S PATENT
-!-DISTANCE MEASURING DEVICE WITH LASER INDICATING DEVICE
DESCRIPTION
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] 'Ibis application claims priority from Chinese Application No.
Zp0420028160.9, filed on June 21, 2004.
PEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
-!-DISTANCE MEASURING DEVICE WITH LASER INDICATING DEVICE
DESCRIPTION
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] 'Ibis application claims priority from Chinese Application No.
Zp0420028160.9, filed on June 21, 2004.
PEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
[0002] Nat Applicable.
TECHNICAL FIELDT~
[0(!03] The present invention relates to a distance measuring device, and more particularly to a distance measuring device which provides at least one laser beam that is beamed onto a surface to form at least one refetence line vertical to the direction in whictw tile measuring signal emiued.
BACICGROUND OP TI-IE INVENTION
[0004] Conventional distance measuring devices comprise a measuring signs!
projecting and deuxting means, wherein the measuring signal can be ultrasonic or laser.
The distance measurement device measut~es the distance between said device and an object surface by sending out a measuring signs! towards said surface sad detecting the reflected signal thereafter and then calculating the distance by a certain circuit. Many such devices are disclosed tn the prlOr art-[0005] In practical use, additional operations are often needed after a distance is determined, such as cutting, drilling, hanging a picture, etc. Very often, after a position is dete<mined by use of an ordinary distance measurement device, a separate laser leveling device is also needed to help achieve said additions! operations. Thus, while distance measuring devices according to the prior art provide a number of advantageous features, they nevertheless have certain limitations. The present invention seeks to overcome certain of these limitations and other drawbacks of the prior art, and to provide new features not heretofore available-Attorney Docket No: 4386 P 035 SUMMARX OF THE INVENTION
[0006] The present inv~tion ~ncrally provides a distance treasuring device with laser indicating device.
[0007] According to one embodiment, the distance measuring device preferably comprises a housing of an upper clamshell housing and a lovwCr clamshell housing, a measuring signal projecting and detecting means, a laser indicating device, a display, a circuit, a sat of battery cells, a switch and some operation buttons. Said measuring signal projecting and detecting means sends out a measuring signal from the front end of said housing to an object surface, stud detects the reflected signal thereafter.
Said laser indicating device can also project at least one laser beam onto a surface. thereby to form ac (cast one visible reference line vto the direction in which the measuring signs) emitting.
[000$] A~ordittg to another embodiment, the distance me&suring device can further comprise a pedestal which can be removable mounted to the housing. The pedestal comprises a base body, a clamping means, and at least one button connected with at feast one needle which is retractable and can be pushed out into a positioning surface.
[0009] According to another embodiment, chc distance measurement device can also comprise at least one horizontal indication device to indicate whether said reference line is horizontal or plumb.
[0010] Other features and advantages of the invention will be apparent from the following Cxamples in the specification taken in cot5junction with the following drawings.
HRI~ DESCRIP~TiON OP TIIE DRAwBYGs [0011] To understand the present invention, it will now be described by way of example, with reference to the accotnpanylng drawings in which:
[001Z] 1?IG. 1 is a perspective view of a distance measuring device with two laser beams pt~ojectittg onto a surface to form two reference lircs;
(0013) FIG. 2 is a perspective view of the lower clamshell housing of the distance tneasurir,g device;
[0014] FIG. 3 is an inner perspective view of the distance measuring device with its upper clamshell housing removed away;
[0015] FIG. 4 is a perspective view of a removable pedestal for the distance measuring device;
Attorney Docket No. 4386 P 035 [0016) FIG. S is a perspective view of the removable pedestal with a series of needles pushed out; and, [001'1) FIG. 6 is a perspective view of the distance measuring device mounted to the removable pedestal.
DETAILED DESCRIPTION
[0018) While this invention is susceptible of embodiment in many different forms, and will herein be described in detail, preferred embodiments of the invention are disclosed with the undet'standing that the present disclosure is to be considered as exemptifrcations of the principles of the invention and are not intended tv limit the broad aspects of the invention to the embodiments illustrated.
[0019) Itefetriag to FIGS. 1-3, the preferred embodiment of a distance measuring device comprises a housing 1 defined by an upper clamshell housing t0 and a lower clamshell housing 12, a measuring signal projecting and detecting means 2, a laser indicating device 3.
a display I6, a circuit (not shown), a set of battery cells (not shown), a ctuunber 40 for containing the battery cells, a cover 42 for the chamber 40. a switch 5 and a series of operation buttons 6.
[0020) In practical use, when the switch 5 is pressed down the battery cells are then electrical connecued to the circuit, the measuring signal projecting and detecting means 2 sends out a signal from the front end 114 of the housing 1 to an object surface I9 in the direction A and detects the reflected signal thereafter. The circuit then calculates the distance between a pt~edetermined position on said housing 1 and the object surface 19.
A general distance measuring anti calculating means and method is a prior art, any further detailed description is not provided here.
[0021] Additionally, the laser indicating device 3 emits at least one laser beam onto a surface to form at least one visible reference line. Referring to PIG. 3, in a preferred embodiment the laser indicating device 3 cornpriscs two laser generating assemblies 30, 32, each of which comprises a laser diode and a sec of lens (not exactly shown) to fan the laser generated by the laser diode to a planar Laser beam 300, 320. The laser beams 300, 320 pass through corresponding aperntres 304 and 324 formed in the housing 1, and project to a surface 18 to form two visible reference lines 302, 322, as shown in PIG. t.
Attorney Docket No. 4386 P 035 -4~-(0022) The laser indicating device 3 can also comprise only one laser diode and a series of optical units which can divide a laser beam into one or scyeral fan-shaped laser beams in dif~ent directions.
[0023] In another embodiment, the laser indicating device 3 comprises one yr more laser diodes and a set of optical units which includes one or mere tenticuisr prism array so that the laser indicating device 3 cart project a plane of diverging laser bums onto the surface 18 to form a series of discrete spots to def-tne at feast one visible reference tine, as described in U.S.
Patent No. 6,005,719.
[0024] The laser indicating device 3 can be switched on or off by the switch S.
Additionally, it can also be controlled by some other switch- In the preferred embodiment, referring to FIG. 1, tire distance measuring device comprises two independent laser switches 60, d2 which can be pressed to trigger the corresponding laser generating assemblies 30, 32.
[0025] The distance measuring device comprises such a circuit that when no laser beam is generated, the measuring result will reach the distance between the rear end 112 of the housing 1 and the object surface 19. Otherwise, when at least oue laser beam 300 or 320 is generated, the measuring result will reach the distance between the lasex beam 300 or 320 and the object ~surfaee 19.
[0026] The distance measuring device of the present invention is preferred to comprise at Least one horizontal indication device for indicating whether a plane is horizontal- Referring to FIG. 1, a first horizontal indication device $1 and a second horizontal indication device 82 are positioned in the housing 1, vertical to each other. lire first and second horizontal indication device 81, 82 can be two water-bubble tubes. When the bubble is in the middle, the water-bubble tube is horizontal- Therefore precise horizontal or vertical referencx lines can be provided with the two water-bubble tubes-(0027] Referring to FIGS. 4-d, the distance measuring device of the present invention may also include a pedestal 9 which can be retrtovably mounted to the housing 1. The pedestal 9 comprises a base body 91, a clamping means 92, at least one button 94 connected with at least one needle 95 which is retractable and can be pushed out into a positioning surface. A hook portion 93 protrudes from the middle of the clamping means 92.
Referring to FIG- d, this is a perspective view showing how the distaace measuring device can be mounted to the pedestal 9 with the whole housing 1 received in the clamping means 92 and one end held by the hook portion 93.
At#orfley Docket No. 4386 P 035 j00Z8] When in practice, a user can switch on the distance measuring device without actuating the laser indicating device, and data will be visible on the display shown the distance between the rear end of the housing and the object surface. A user can also switch on die laser indicating device when measuring distance such that the result shown on the display is the distance between the laser beams and the object surface. Then, the distance measuring device can be placed in the position where a desired distance is attained, so that the user can go on for hislher next work, such as cutting, drilling. hanging a picture, ate, with the reference of the visible lines formed by the Laser beams.
(00Z9] If a user only wants to measure the distance between an enact position and a surface, the user can also switch on the laser indicating device with the laser beams passing across the position when measuring. With such a step, the measuring result will be very Pte.
(0030] Additionally, the distance measuring device with a laser indicating device of the present invention can also be used only for leveling and indicating.
[0031 Several alternative embodiments and examples have been described and illustrated herein. A, person of ordinary skilled in the art would appreciate the features ef the individual embodiments, and the possible combinations and variations of d1e components. A
person of ordinary skill in the art would further appreciate that any of the embodiments could be provided in any combination with the other embodiments disclosed herein_ Additionally, the terms "first," "second," and "third" as used herein are intended for illustrative purposes only and do not limit the embodiments in any way. Further, the term "plurality" as used herein indicates any number greater than one, either disjunctively or conjunctively, as necessary, up to an infinite number.
[0032] It will be understood that the invention may be embodied in other specific fotrns without departing from the spirit or central characteristics thereof.
The present examples and embodiments, thcnefore, are to be considered in all respects as illustrative and not restrictive, and the invention is not to be limited to the details given herein.
TECHNICAL FIELDT~
[0(!03] The present invention relates to a distance measuring device, and more particularly to a distance measuring device which provides at least one laser beam that is beamed onto a surface to form at least one refetence line vertical to the direction in whictw tile measuring signal emiued.
BACICGROUND OP TI-IE INVENTION
[0004] Conventional distance measuring devices comprise a measuring signs!
projecting and deuxting means, wherein the measuring signal can be ultrasonic or laser.
The distance measurement device measut~es the distance between said device and an object surface by sending out a measuring signs! towards said surface sad detecting the reflected signal thereafter and then calculating the distance by a certain circuit. Many such devices are disclosed tn the prlOr art-[0005] In practical use, additional operations are often needed after a distance is determined, such as cutting, drilling, hanging a picture, etc. Very often, after a position is dete<mined by use of an ordinary distance measurement device, a separate laser leveling device is also needed to help achieve said additions! operations. Thus, while distance measuring devices according to the prior art provide a number of advantageous features, they nevertheless have certain limitations. The present invention seeks to overcome certain of these limitations and other drawbacks of the prior art, and to provide new features not heretofore available-Attorney Docket No: 4386 P 035 SUMMARX OF THE INVENTION
[0006] The present inv~tion ~ncrally provides a distance treasuring device with laser indicating device.
[0007] According to one embodiment, the distance measuring device preferably comprises a housing of an upper clamshell housing and a lovwCr clamshell housing, a measuring signal projecting and detecting means, a laser indicating device, a display, a circuit, a sat of battery cells, a switch and some operation buttons. Said measuring signal projecting and detecting means sends out a measuring signal from the front end of said housing to an object surface, stud detects the reflected signal thereafter.
Said laser indicating device can also project at least one laser beam onto a surface. thereby to form ac (cast one visible reference line vto the direction in which the measuring signs) emitting.
[000$] A~ordittg to another embodiment, the distance me&suring device can further comprise a pedestal which can be removable mounted to the housing. The pedestal comprises a base body, a clamping means, and at least one button connected with at feast one needle which is retractable and can be pushed out into a positioning surface.
[0009] According to another embodiment, chc distance measurement device can also comprise at least one horizontal indication device to indicate whether said reference line is horizontal or plumb.
[0010] Other features and advantages of the invention will be apparent from the following Cxamples in the specification taken in cot5junction with the following drawings.
HRI~ DESCRIP~TiON OP TIIE DRAwBYGs [0011] To understand the present invention, it will now be described by way of example, with reference to the accotnpanylng drawings in which:
[001Z] 1?IG. 1 is a perspective view of a distance measuring device with two laser beams pt~ojectittg onto a surface to form two reference lircs;
(0013) FIG. 2 is a perspective view of the lower clamshell housing of the distance tneasurir,g device;
[0014] FIG. 3 is an inner perspective view of the distance measuring device with its upper clamshell housing removed away;
[0015] FIG. 4 is a perspective view of a removable pedestal for the distance measuring device;
Attorney Docket No. 4386 P 035 [0016) FIG. S is a perspective view of the removable pedestal with a series of needles pushed out; and, [001'1) FIG. 6 is a perspective view of the distance measuring device mounted to the removable pedestal.
DETAILED DESCRIPTION
[0018) While this invention is susceptible of embodiment in many different forms, and will herein be described in detail, preferred embodiments of the invention are disclosed with the undet'standing that the present disclosure is to be considered as exemptifrcations of the principles of the invention and are not intended tv limit the broad aspects of the invention to the embodiments illustrated.
[0019) Itefetriag to FIGS. 1-3, the preferred embodiment of a distance measuring device comprises a housing 1 defined by an upper clamshell housing t0 and a lower clamshell housing 12, a measuring signal projecting and detecting means 2, a laser indicating device 3.
a display I6, a circuit (not shown), a set of battery cells (not shown), a ctuunber 40 for containing the battery cells, a cover 42 for the chamber 40. a switch 5 and a series of operation buttons 6.
[0020) In practical use, when the switch 5 is pressed down the battery cells are then electrical connecued to the circuit, the measuring signal projecting and detecting means 2 sends out a signal from the front end 114 of the housing 1 to an object surface I9 in the direction A and detects the reflected signal thereafter. The circuit then calculates the distance between a pt~edetermined position on said housing 1 and the object surface 19.
A general distance measuring anti calculating means and method is a prior art, any further detailed description is not provided here.
[0021] Additionally, the laser indicating device 3 emits at least one laser beam onto a surface to form at least one visible reference line. Referring to PIG. 3, in a preferred embodiment the laser indicating device 3 cornpriscs two laser generating assemblies 30, 32, each of which comprises a laser diode and a sec of lens (not exactly shown) to fan the laser generated by the laser diode to a planar Laser beam 300, 320. The laser beams 300, 320 pass through corresponding aperntres 304 and 324 formed in the housing 1, and project to a surface 18 to form two visible reference lines 302, 322, as shown in PIG. t.
Attorney Docket No. 4386 P 035 -4~-(0022) The laser indicating device 3 can also comprise only one laser diode and a series of optical units which can divide a laser beam into one or scyeral fan-shaped laser beams in dif~ent directions.
[0023] In another embodiment, the laser indicating device 3 comprises one yr more laser diodes and a set of optical units which includes one or mere tenticuisr prism array so that the laser indicating device 3 cart project a plane of diverging laser bums onto the surface 18 to form a series of discrete spots to def-tne at feast one visible reference tine, as described in U.S.
Patent No. 6,005,719.
[0024] The laser indicating device 3 can be switched on or off by the switch S.
Additionally, it can also be controlled by some other switch- In the preferred embodiment, referring to FIG. 1, tire distance measuring device comprises two independent laser switches 60, d2 which can be pressed to trigger the corresponding laser generating assemblies 30, 32.
[0025] The distance measuring device comprises such a circuit that when no laser beam is generated, the measuring result will reach the distance between the rear end 112 of the housing 1 and the object surface 19. Otherwise, when at least oue laser beam 300 or 320 is generated, the measuring result will reach the distance between the lasex beam 300 or 320 and the object ~surfaee 19.
[0026] The distance measuring device of the present invention is preferred to comprise at Least one horizontal indication device for indicating whether a plane is horizontal- Referring to FIG. 1, a first horizontal indication device $1 and a second horizontal indication device 82 are positioned in the housing 1, vertical to each other. lire first and second horizontal indication device 81, 82 can be two water-bubble tubes. When the bubble is in the middle, the water-bubble tube is horizontal- Therefore precise horizontal or vertical referencx lines can be provided with the two water-bubble tubes-(0027] Referring to FIGS. 4-d, the distance measuring device of the present invention may also include a pedestal 9 which can be retrtovably mounted to the housing 1. The pedestal 9 comprises a base body 91, a clamping means 92, at least one button 94 connected with at least one needle 95 which is retractable and can be pushed out into a positioning surface. A hook portion 93 protrudes from the middle of the clamping means 92.
Referring to FIG- d, this is a perspective view showing how the distaace measuring device can be mounted to the pedestal 9 with the whole housing 1 received in the clamping means 92 and one end held by the hook portion 93.
At#orfley Docket No. 4386 P 035 j00Z8] When in practice, a user can switch on the distance measuring device without actuating the laser indicating device, and data will be visible on the display shown the distance between the rear end of the housing and the object surface. A user can also switch on die laser indicating device when measuring distance such that the result shown on the display is the distance between the laser beams and the object surface. Then, the distance measuring device can be placed in the position where a desired distance is attained, so that the user can go on for hislher next work, such as cutting, drilling. hanging a picture, ate, with the reference of the visible lines formed by the Laser beams.
(00Z9] If a user only wants to measure the distance between an enact position and a surface, the user can also switch on the laser indicating device with the laser beams passing across the position when measuring. With such a step, the measuring result will be very Pte.
(0030] Additionally, the distance measuring device with a laser indicating device of the present invention can also be used only for leveling and indicating.
[0031 Several alternative embodiments and examples have been described and illustrated herein. A, person of ordinary skilled in the art would appreciate the features ef the individual embodiments, and the possible combinations and variations of d1e components. A
person of ordinary skill in the art would further appreciate that any of the embodiments could be provided in any combination with the other embodiments disclosed herein_ Additionally, the terms "first," "second," and "third" as used herein are intended for illustrative purposes only and do not limit the embodiments in any way. Further, the term "plurality" as used herein indicates any number greater than one, either disjunctively or conjunctively, as necessary, up to an infinite number.
[0032] It will be understood that the invention may be embodied in other specific fotrns without departing from the spirit or central characteristics thereof.
The present examples and embodiments, thcnefore, are to be considered in all respects as illustrative and not restrictive, and the invention is not to be limited to the details given herein.
Claims (25)
1. A distance measuring device, comprising:
a housing having a distance measuring detector to determine a distance to an object surface, a circuit is the housing, and a laser indicating device to project at least one laser beam from the housing, wherein the circuit calculates the distance between the at least one laser beam and the object surface.
a housing having a distance measuring detector to determine a distance to an object surface, a circuit is the housing, and a laser indicating device to project at least one laser beam from the housing, wherein the circuit calculates the distance between the at least one laser beam and the object surface.
2. The distance measuring device of claim 1, wherein the circuit calculates the distance between the laser beam and the object surface when the laser indicating device is switched on, and wherein the circuit calculates the distance between a predetermined position on the housing and the object surface when the laser indicating device is not switched on.
3. The distance measuring device of claim 1, wherein the distance measuring detector projects a measuring signal to the object surface and detects a reflection of said measuring signal therefrom.
4. The distance measuring device of claim 3, wherein the distance measuring detector projects a measuring signal, and wherein the laser indicating device projects the at least one laser beam in a direction substantial perpendicular to the direction of the projected measuring signal.
5. The distance measuring device of claim 1, wherein the laser indicating device projects the at least one laser beam in a direction transverse to a measuring signal transmitted from the distance measuring detector.
6. The disc measuring device of claim 1, wherein the laser indicating device projects the at least one laser beam in a direction vertical to the direction in which a measuring signal is projected from the distance measuring detector.
7. The distance measuring device of claim 1, wherein said at least one laser beam projects a laser beam on a surface to form at least one visible reference line on the surface.
8. The distance measuring device of claim 7, further comprising another laser indicating device to project an opposing laser beam from the housing and on an opposing surface to form a visible reference line on the opposing surface.
9. The distance measuring device of claim 1, wherein the distance measuring detector projects a measuring signal from a bottom of the housing, and wherein the laser indicating device projects the laser beam from a side of the housing.
10. The distance measuring device of claim 1, further comprising at least one horizontal indication device.
11. The distance measuring device of claim 1, further comprising a removable pedestal to connect to the housing of the distance measuring device.
12. The distance measuring device of claim 11, wherein the pedestal comprises a base body and a clamping means which has at least one hook portion protruding out of the base body.
13. The distance measuring device of claim 11, wherein said pedestal further comprises at least one button connected with at least one retractable needle adapted to protrude from the pedestal.
14. The distance measuring device of claim 1, further comprising a lens adjacent the laser emitter, the lens fanning the laser projected by the laser emitter to a planar laser beam.
15. The distance measuring device of claim 1, further comprising a second laser indicating device in the housing, the laser indicating device projecting a first laser beam from the housing, and the second laser indicating device projecting a second laser beam from the housing.
16. The distance measuring device of claim 15, wherein the first laser beam is projected from the laser indicating device in a first direction, and wherein the second laser beam is projected from the second laser indicating device in a second direction.
17. A distance measuring device, comprising:
a housing having a measuring signal projector and detector to project a measuring signal to an object surface and detect a reflection of said measuring signal therefrom, a circuit in said housing, and a laser emitter to project at least one laser beam from said housing, wherein circuit calculates the distance between said at least one laser beam and said object surface when said laser emitter is switched on, and wherein said circuit calculates the distance between a predetermined position on said housing and said object surface when said laser emitter is not switched on.
a housing having a measuring signal projector and detector to project a measuring signal to an object surface and detect a reflection of said measuring signal therefrom, a circuit in said housing, and a laser emitter to project at least one laser beam from said housing, wherein circuit calculates the distance between said at least one laser beam and said object surface when said laser emitter is switched on, and wherein said circuit calculates the distance between a predetermined position on said housing and said object surface when said laser emitter is not switched on.
18. The distance measuring device of claim 17, further comprising a pedestal removably connected to the housing.
19. The distance measuring device of claim 18, wherein the pedestal comprises a base body and a clamping means which has at least one hook portion protruding out of the base body to removably secure the pedestal to the housing.
20. The distance measuring device of claim 17, further comprising a display on the housing to display the calculated distance.
21. The distance measuring device of claim 17, wherein the at least one laser beam is projected in a direction generally perpendicular to the direction of the projected measuring signal.
22. A distance measuring device comprising:
a housing having a measuring signal projector and detector to project a measuring signal to an object surface and detect a reflection of said measuring signal therefrom, a laser indicating device to project at least one laser beam from said housing, and a pedestal removably connected to the housing.
a housing having a measuring signal projector and detector to project a measuring signal to an object surface and detect a reflection of said measuring signal therefrom, a laser indicating device to project at least one laser beam from said housing, and a pedestal removably connected to the housing.
23. The distance measuring device of claim 22, wherein the pedestal comprises a base body and a clamping means which has at least one hook portion protruding out of the base body to removably secure the pedestal to the housing.
24. The distance measuring device of claim 22, wherein the laser beam is projected in a direction vertical to the direction in which said measuring signal is projected.
25. A method of measuring the distance to an object surface, comprising the acts of:
projecting at least one laser beam;
projecting a measuring signal in the direction of the object surface;
detecting a reflection of the measuring signal from the object surface; and, calculating a distance from the laser beam to the object surface.
projecting at least one laser beam;
projecting a measuring signal in the direction of the object surface;
detecting a reflection of the measuring signal from the object surface; and, calculating a distance from the laser beam to the object surface.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2004200281609U CN2720458Y (en) | 2004-06-21 | 2004-06-21 | Distance-measuring instrument |
| CN2004200281609 | 2004-06-21 | ||
| US11/004,341 | 2004-12-03 | ||
| US11/004,341 US20050280802A1 (en) | 2004-06-21 | 2004-12-03 | Distance measuring device with laser indicating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2491597A1 true CA2491597A1 (en) | 2005-12-21 |
Family
ID=35767544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2491597 Abandoned CA2491597A1 (en) | 2004-06-21 | 2004-12-24 | Distance measuring device with laser indicating device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2491597A1 (en) |
-
2004
- 2004-12-24 CA CA 2491597 patent/CA2491597A1/en not_active Abandoned
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| Date | Code | Title | Description |
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| EEER | Examination request | ||
| FZDE | Dead |