CA2178552A1 - Method and apparatus to detect imminent battery removal in a portable electronic device - Google Patents
Method and apparatus to detect imminent battery removal in a portable electronic deviceInfo
- Publication number
- CA2178552A1 CA2178552A1 CA002178552A CA2178552A CA2178552A1 CA 2178552 A1 CA2178552 A1 CA 2178552A1 CA 002178552 A CA002178552 A CA 002178552A CA 2178552 A CA2178552 A CA 2178552A CA 2178552 A1 CA2178552 A1 CA 2178552A1
- Authority
- CA
- Canada
- Prior art keywords
- battery
- state
- powered device
- battery powered
- latching system
- 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.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000011664 signaling Effects 0.000 claims 4
- 238000012544 monitoring process Methods 0.000 claims 2
- 230000000977 initiatory effect Effects 0.000 claims 1
- 241000518994 Conta Species 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- KRTSDMXIXPKRQR-AATRIKPKSA-N monocrotophos Chemical compound CNC(=O)\C=C(/C)OP(=O)(OC)OC KRTSDMXIXPKRQR-AATRIKPKSA-N 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Mounting, Suspending (AREA)
- Power Sources (AREA)
Abstract
A method and apparatus to detect the imminent removal of the battery from a portable electronic device and to automatically shut off said device before electrical power from the battery is lost.
Description
TITLE:
MEJHOD AND APPARATUS TO DETECT IMMINENT BArrERY REMOVAL
IN A PORTABLE ELECTRONIC DEVICE
SPECIFICATION
TECHNICAL FIE~D
The invention relates generally to methods for making battery interconnections and in particular to methods and apparatus for detecting when the batteries of a portable electronic devic~ are being remoYed so that th~ deYice can be automatically sh~t off before electrical po~ver from the main batteries is lost.
BACKGROUr~D OF THE Ir~VENTION
Batteries are a convenient source of eledrical power for portable electronio devices.
r~on-rGchar~eable batteries, howover, normally have a limited life and must be replaced periodically. Rechargeable batteries typically have a longer useful life than non-rechargeable batteries, but they too may at times require removal or replacement When an electronic device's main bat~eries must be removed, it is usually desirable to have the de~ice switched off to avoid damagc to the device or loss of the data stored therein.
Nev~rtheless, the forgetful or untrained user may often fail to switch the device off before removing its main batteries.
Consequently, it would be desirable to have a method of detecting w~en the main batteries of a portable eledronic device were being removed, and for automatically shutting off the devi~e or switching to a backup batte~y before electrical power from said main batteries was lost.
"~
SUMMARY OF ~HE INVENTION
Therefore, it is the object o~ the present invention to pro~ide a simple method and apparatus for electro-mechanically detecting the imminent removal of the main batteries from a portable electronic device so that the device can automatically shut itself off or 5 switch to backup battery power before electrical power from the main batteries is lost Principle features and advantages of the present invention ~ill become apparent from the ~ollowing description and accompanying drawings, which set forth by way of illustration and exampl~ speci~lc embodiments of the invention.
BRIEF ~ESCRIP~ON OF THE DRA~NGS
FIG. 1 is an exploded view of the preferred embodiment of the invention. (Note:
Components designated by reference numbers18, 30, 32, 52, 54, and 56 were inadvertently drawn rotated 180 from the other components shown in the drawing.) FIG. 2 is a sectional side elevational Yiew of the embodiment of the inYention in FIG.
1 showing the latch in the latched position.
FIG 3 is a sectional side elevational view of the embodiment of the invention in FIG.
1 showing the latch in the unlatched position.
DETAILED DESCRIPTIO~
FIG. 1 is an exploded Yiew of the preferred embodiment o~ the invention. (l~lote:
Components designated by reference numbers18, 30, 32, 52, 54, and 56 were 20 inadvertently drawn rotated 180 from the other components shown in the drawing.) A
large, redangular aperture 52 in the housing 54 of the portable electronic device allows insertion of a battery or batteries into the device. A smaller rectangular aperture 56 adjacent to the large aperture allows access to the la~ch block 58 switch surface 10. A
flange 12 and rib 14 are attached to the housing 54 mate with ~he cover plate 16 to form 25 a rectangular channel In which the latch block ~8 can slide. A battery compartment shell 18 which consists of a cavity into which a battery or batteries can be placed is attached to the inside face of the housing 54 around the aperture 52.
The latch block 58 is inserted within the d~annel ~ormed by flange 12 and rib 14 and is retained by the cov~r plate 16. Two ribs 20 and 22 molded into the latch block 58 30 pro~Jide contact surfaces that engage the spring contacts 24 and 26 when the latch block JUN-07-1996 13:46 SUITER & RSSOCI~TES PC 4023340377 P.04 58 is slid to the unlatched position. The latch block 58 contains a surface 10 which protrudes through the housing ~4 fo~ y a switch and a prong 28 which extends through a notch 30 in the forward wall of the battery compartrnent shell 18 to hold the battery COlllpdl lll,ent cover 32 securely in place enclosing the battery compartment.
The pins 34 and 36 of the spring contacts 24 and 26 are press fit through holes 38 and 40 in a recessed ca~/ity 42 of the cover plate 16. These pins 34 and 36 are then soldered to a flexible circuit 44 which is connected to the main circuit board of the device (not shown).
FiGS. 2 and 3 are sectional side elevational viewS of the invention. FIG. 2 shows the latch block 58 in the latched position. The two spring contacts 24 and 26 are not in contact with the latch block ribs 20 and 22 and are allowed to rest on a rib 14 protruding from the de~ice's bottom housing 54. FIG. 3 shows the latch block 58 in the unlatched position Ribs 20 and 22 on the latch block are in contact with the two sprina contacts 24 and 26 cornpleting a circuit behtYeen them.
OPERATIOI`I OF THE INVEtlTION
As the need arises to remove the batteries of the porta~le electronic device thelatch block is slid from the latched position shown in FIG. 2 to the unlatched position shown in FIG. 3 to allow removal of the battery compartment cover. Ribs mold~d into the latch block make contact with two spring metal conta~ls completing a circuit behveen them. The portable electronic device reacts to the completion of the circuit by executing a routEne causing an order~y shutdown of the processor or switch over to backup battery power before the main baneries can be removed.
When the main batteries are inserted into the port~ble electronic deYice the battery c~",~a,lr"ent cover is replaced. The latch block is slid from the unlatched position to the latched position to retain the battery compartment cover. The latch block ribs dis-engage the two spring contacts breaking the circuit between them. The portable electronic device can then be switched on.
MEJHOD AND APPARATUS TO DETECT IMMINENT BArrERY REMOVAL
IN A PORTABLE ELECTRONIC DEVICE
SPECIFICATION
TECHNICAL FIE~D
The invention relates generally to methods for making battery interconnections and in particular to methods and apparatus for detecting when the batteries of a portable electronic devic~ are being remoYed so that th~ deYice can be automatically sh~t off before electrical po~ver from the main batteries is lost.
BACKGROUr~D OF THE Ir~VENTION
Batteries are a convenient source of eledrical power for portable electronio devices.
r~on-rGchar~eable batteries, howover, normally have a limited life and must be replaced periodically. Rechargeable batteries typically have a longer useful life than non-rechargeable batteries, but they too may at times require removal or replacement When an electronic device's main bat~eries must be removed, it is usually desirable to have the de~ice switched off to avoid damagc to the device or loss of the data stored therein.
Nev~rtheless, the forgetful or untrained user may often fail to switch the device off before removing its main batteries.
Consequently, it would be desirable to have a method of detecting w~en the main batteries of a portable eledronic device were being removed, and for automatically shutting off the devi~e or switching to a backup batte~y before electrical power from said main batteries was lost.
"~
SUMMARY OF ~HE INVENTION
Therefore, it is the object o~ the present invention to pro~ide a simple method and apparatus for electro-mechanically detecting the imminent removal of the main batteries from a portable electronic device so that the device can automatically shut itself off or 5 switch to backup battery power before electrical power from the main batteries is lost Principle features and advantages of the present invention ~ill become apparent from the ~ollowing description and accompanying drawings, which set forth by way of illustration and exampl~ speci~lc embodiments of the invention.
BRIEF ~ESCRIP~ON OF THE DRA~NGS
FIG. 1 is an exploded view of the preferred embodiment of the invention. (Note:
Components designated by reference numbers18, 30, 32, 52, 54, and 56 were inadvertently drawn rotated 180 from the other components shown in the drawing.) FIG. 2 is a sectional side elevational Yiew of the embodiment of the inYention in FIG.
1 showing the latch in the latched position.
FIG 3 is a sectional side elevational view of the embodiment of the invention in FIG.
1 showing the latch in the unlatched position.
DETAILED DESCRIPTIO~
FIG. 1 is an exploded Yiew of the preferred embodiment o~ the invention. (l~lote:
Components designated by reference numbers18, 30, 32, 52, 54, and 56 were 20 inadvertently drawn rotated 180 from the other components shown in the drawing.) A
large, redangular aperture 52 in the housing 54 of the portable electronic device allows insertion of a battery or batteries into the device. A smaller rectangular aperture 56 adjacent to the large aperture allows access to the la~ch block 58 switch surface 10. A
flange 12 and rib 14 are attached to the housing 54 mate with ~he cover plate 16 to form 25 a rectangular channel In which the latch block ~8 can slide. A battery compartment shell 18 which consists of a cavity into which a battery or batteries can be placed is attached to the inside face of the housing 54 around the aperture 52.
The latch block 58 is inserted within the d~annel ~ormed by flange 12 and rib 14 and is retained by the cov~r plate 16. Two ribs 20 and 22 molded into the latch block 58 30 pro~Jide contact surfaces that engage the spring contacts 24 and 26 when the latch block JUN-07-1996 13:46 SUITER & RSSOCI~TES PC 4023340377 P.04 58 is slid to the unlatched position. The latch block 58 contains a surface 10 which protrudes through the housing ~4 fo~ y a switch and a prong 28 which extends through a notch 30 in the forward wall of the battery compartrnent shell 18 to hold the battery COlllpdl lll,ent cover 32 securely in place enclosing the battery compartment.
The pins 34 and 36 of the spring contacts 24 and 26 are press fit through holes 38 and 40 in a recessed ca~/ity 42 of the cover plate 16. These pins 34 and 36 are then soldered to a flexible circuit 44 which is connected to the main circuit board of the device (not shown).
FiGS. 2 and 3 are sectional side elevational viewS of the invention. FIG. 2 shows the latch block 58 in the latched position. The two spring contacts 24 and 26 are not in contact with the latch block ribs 20 and 22 and are allowed to rest on a rib 14 protruding from the de~ice's bottom housing 54. FIG. 3 shows the latch block 58 in the unlatched position Ribs 20 and 22 on the latch block are in contact with the two sprina contacts 24 and 26 cornpleting a circuit behtYeen them.
OPERATIOI`I OF THE INVEtlTION
As the need arises to remove the batteries of the porta~le electronic device thelatch block is slid from the latched position shown in FIG. 2 to the unlatched position shown in FIG. 3 to allow removal of the battery compartment cover. Ribs mold~d into the latch block make contact with two spring metal conta~ls completing a circuit behveen them. The portable electronic device reacts to the completion of the circuit by executing a routEne causing an order~y shutdown of the processor or switch over to backup battery power before the main baneries can be removed.
When the main batteries are inserted into the port~ble electronic deYice the battery c~",~a,lr"ent cover is replaced. The latch block is slid from the unlatched position to the latched position to retain the battery compartment cover. The latch block ribs dis-engage the two spring contacts breaking the circuit between them. The portable electronic device can then be switched on.
Claims (11)
1. Apparatus for detecting battery removal from a battery powered device, comprising:
a) a battery housing, having an access aperture, for removably receiving a battery, b) a latching system, having a closed state and an open state, for securing a battery within said battery housing when said latching system is in the closed state and for permitting removal of a battery when said latching system is in the open state, and c) a signaling device for signaling the state of said latching system to an electrical component of the battery powered device.
a) a battery housing, having an access aperture, for removably receiving a battery, b) a latching system, having a closed state and an open state, for securing a battery within said battery housing when said latching system is in the closed state and for permitting removal of a battery when said latching system is in the open state, and c) a signaling device for signaling the state of said latching system to an electrical component of the battery powered device.
2. An apparatus according to claim 1 wherein said signaling device sends an electrical signal to the electrical component of the battery powered device when said latching system is in the open state.
3. An apparatus according to claim 1 wherein the battery powered device further comprises an open circuit and wherein said signaling device signals the electrical component of the battery powered device by completing the open circuit of the battery powered device.
4. An apparatus according to claim 1 wherein the electrical component of the battery powered device initiates an orderly shutdown of the battery powered device upon determining that said latching system has been changed from said closed state to said open state.
5. An apparatus according to claim 1 wherein the battery powered device further comprises a back-up battery capable of providing operating power to the battery powered device, and wherein the electrical component is capable of configuring the battery powered device to receive operating power from said back-up battery upon determining that said latching system has been changed from the dosed state to the open state.
6. An apparatus according to claim 1 wherein the battery powered device further comprises a battery housing cover.
7. An apparatus according to claim 6 wherein said latching system secures said battery housing cover to said battery housing when said latching system is in the closed state so that a battery in the battery housing cannot be removed.
8. An apparatus according to claim 6 wherein said latching system permits said battery housing cover to open when said latching system is in the open state so that a battery in the battery housing can be removed.
9. An apparatus according to claim 3 wherein the open circuit of the battery powered device includes a first spring contact and a second spring contact and wherein said signal device completes the open circuit by conductively connecting said first spring contact to said second spring contact
10. A method of responding to an imminent withdrawal of a removable battery from a battery powered system, comprising the steps of:
a) monitoring a signal indicative of the state of a latch system which permits removal of a battery when in an open state and which prohibits removal of a battery when in a closed state;
b) determining the state of the latch system; and c) initiating a shutdown of the battery powered device upon determining that the latch system is in an open state.
a) monitoring a signal indicative of the state of a latch system which permits removal of a battery when in an open state and which prohibits removal of a battery when in a closed state;
b) determining the state of the latch system; and c) initiating a shutdown of the battery powered device upon determining that the latch system is in an open state.
11. A method of responding to an imminent withdrawal of a removable battery from a battery powered system, comprising the steps of:
a) monitoring a signal indicative of the state of a latch system which permits removal of a battery when in an open state and which prohibits removal of a battery when in a dosed state;
b) determining the state of the latch system; and c) enabling the battery powered device to draw operating from a back-up battery upon determining that the latch system is in an open state.
a) monitoring a signal indicative of the state of a latch system which permits removal of a battery when in an open state and which prohibits removal of a battery when in a dosed state;
b) determining the state of the latch system; and c) enabling the battery powered device to draw operating from a back-up battery upon determining that the latch system is in an open state.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/482643 | 1995-06-07 | ||
| US08/482,643 US5733673A (en) | 1995-06-07 | 1995-06-07 | Method and apparatus to detect imminent battery removal in a portable electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2178552A1 true CA2178552A1 (en) | 1996-12-08 |
Family
ID=23916859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002178552A Abandoned CA2178552A1 (en) | 1995-06-07 | 1996-06-07 | Method and apparatus to detect imminent battery removal in a portable electronic device |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US5733673A (en) |
| CA (1) | CA2178552A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2424990A (en) * | 2005-04-08 | 2006-10-11 | Uniwill Comp Corp | Battery housing structure for portable devices |
| US7492273B2 (en) | 2003-03-10 | 2009-02-17 | Walter Kidde Portable Equipment, Inc. | Pivoting battery carrier and a life safety device incorporating the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5898290A (en) * | 1995-09-07 | 1999-04-27 | Norand Corporation | Battery pack with capacity and pre-removal indicators |
| US6141223A (en) * | 1998-05-08 | 2000-10-31 | Smk Manufacturing, Inc. | Battery assembly for supplying power to an integrated circuit |
| FI19991860A7 (en) * | 1999-09-01 | 2001-03-02 | Nokia Corp | Method and arrangement for predicting the moment of battery pack disconnection of a battery-powered electronic device and battery-powered electronic device |
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| CN100395903C (en) * | 2005-06-10 | 2008-06-18 | 深圳富泰宏精密工业有限公司 | Cell cover latch-lock structure |
| CN104162200B (en) | 2006-02-09 | 2018-03-27 | 德卡产品有限公司 | peripheral system |
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| US11478623B2 (en) | 2006-02-09 | 2022-10-25 | Deka Products Limited Partnership | Infusion pump assembly |
| US11364335B2 (en) | 2006-02-09 | 2022-06-21 | Deka Products Limited Partnership | Apparatus, system and method for fluid delivery |
| US12151080B2 (en) | 2006-02-09 | 2024-11-26 | Deka Products Limited Partnership | Adhesive and peripheral systems and methods for medical devices |
| US11497846B2 (en) | 2006-02-09 | 2022-11-15 | Deka Products Limited Partnership | Patch-sized fluid delivery systems and methods |
| EP2121077A1 (en) | 2007-02-09 | 2009-11-25 | Deka Products Limited Partnership | Automated insertion assembly |
| US8881774B2 (en) | 2007-12-31 | 2014-11-11 | Deka Research & Development Corp. | Apparatus, system and method for fluid delivery |
| US10188787B2 (en) | 2007-12-31 | 2019-01-29 | Deka Products Limited Partnership | Apparatus, system and method for fluid delivery |
| US10080704B2 (en) | 2007-12-31 | 2018-09-25 | Deka Products Limited Partnership | Apparatus, system and method for fluid delivery |
| US8900188B2 (en) | 2007-12-31 | 2014-12-02 | Deka Products Limited Partnership | Split ring resonator antenna adapted for use in wirelessly controlled medical device |
| US12447265B2 (en) | 2007-12-31 | 2025-10-21 | Deka Products Limited Partnership | Apparatus, system and method for fluid delivery |
| CN110251769B (en) | 2007-12-31 | 2022-04-01 | 德卡产品有限公司 | Infusion pump assembly |
| US9456955B2 (en) | 2007-12-31 | 2016-10-04 | Deka Products Limited Partnership | Apparatus, system and method for fluid delivery |
| WO2009088956A2 (en) * | 2007-12-31 | 2009-07-16 | Deka Products Limited Partnership | Infusion pump assembly |
| WO2010031059A2 (en) | 2008-09-15 | 2010-03-18 | Deka Products Limited Partnership | Systems and methods for fluid delivery |
| US8066672B2 (en) | 2008-10-10 | 2011-11-29 | Deka Products Limited Partnership | Infusion pump assembly with a backup power supply |
| US8708376B2 (en) | 2008-10-10 | 2014-04-29 | Deka Products Limited Partnership | Medium connector |
| US8016789B2 (en) | 2008-10-10 | 2011-09-13 | Deka Products Limited Partnership | Pump assembly with a removable cover assembly |
| US8223028B2 (en) | 2008-10-10 | 2012-07-17 | Deka Products Limited Partnership | Occlusion detection system and method |
| US12186531B2 (en) | 2008-10-10 | 2025-01-07 | Deka Products Limited Partnership | Infusion pump assembly |
| US12370327B2 (en) | 2008-10-10 | 2025-07-29 | Deka Products Limited Partnership | Infusion pump methods, systems and apparatus |
| US9180245B2 (en) | 2008-10-10 | 2015-11-10 | Deka Products Limited Partnership | System and method for administering an infusible fluid |
| US8267892B2 (en) | 2008-10-10 | 2012-09-18 | Deka Products Limited Partnership | Multi-language / multi-processor infusion pump assembly |
| US8262616B2 (en) | 2008-10-10 | 2012-09-11 | Deka Products Limited Partnership | Infusion pump assembly |
| CA2787178C (en) | 2010-01-22 | 2019-02-12 | Deka Products Limited Partnership | Method and system for shape-memory alloy wire control |
| KR101843983B1 (en) * | 2011-06-14 | 2018-03-30 | 삼성전자주식회사 | Apparatus and method for changing a battery in a portable terminal |
| US11524151B2 (en) | 2012-03-07 | 2022-12-13 | Deka Products Limited Partnership | Apparatus, system and method for fluid delivery |
| WO2015003145A1 (en) | 2013-07-03 | 2015-01-08 | Deka Products Limited Partnership | Apparatus, system and method for fluid delivery |
| US11523972B2 (en) | 2018-04-24 | 2022-12-13 | Deka Products Limited Partnership | Apparatus, system and method for fluid delivery |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4690878A (en) * | 1985-08-23 | 1987-09-01 | Minolta Camera Kabukishi Kaisha | Battery power detector for sensing presence of batteries |
| US5212021A (en) * | 1992-02-21 | 1993-05-18 | Duracell Inc. | Energy pack and individual battery cell cartridge |
| CA2089994C (en) * | 1992-04-17 | 1997-08-05 | Pamela M. St. John | Automatic backup battery connection |
-
1995
- 1995-06-07 US US08/482,643 patent/US5733673A/en not_active Expired - Lifetime
-
1996
- 1996-06-07 CA CA002178552A patent/CA2178552A1/en not_active Abandoned
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7492273B2 (en) | 2003-03-10 | 2009-02-17 | Walter Kidde Portable Equipment, Inc. | Pivoting battery carrier and a life safety device incorporating the same |
| US7948389B2 (en) | 2003-03-10 | 2011-05-24 | Walter Kidde Portable Equipment, Inc. | Pivoting battery carrier and a life safety device incorporating the same |
| GB2424990A (en) * | 2005-04-08 | 2006-10-11 | Uniwill Comp Corp | Battery housing structure for portable devices |
| GB2424990B (en) * | 2005-04-08 | 2007-01-10 | Uniwill Comp Corp | Battery housing structure for portable device |
Also Published As
| Publication number | Publication date |
|---|---|
| US5733673A (en) | 1998-03-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |