CN1091293C - 轴承组件,使用其的电气马达,及旋转盘数据存储设备 - Google Patents
轴承组件,使用其的电气马达,及旋转盘数据存储设备 Download PDFInfo
- Publication number
- CN1091293C CN1091293C CN96104478A CN96104478A CN1091293C CN 1091293 C CN1091293 C CN 1091293C CN 96104478 A CN96104478 A CN 96104478A CN 96104478 A CN96104478 A CN 96104478A CN 1091293 C CN1091293 C CN 1091293C
- Authority
- CN
- China
- Prior art keywords
- ball
- bearing face
- spill
- axle
- support
- 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 - Fee Related
Links
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 17
- 238000013500 data storage Methods 0.000 claims description 9
- 239000000725 suspension Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
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- 230000004044 response Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 2
- 241000239290 Araneae Species 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 18
- 230000036316 preload Effects 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 20
- 230000035939 shock Effects 0.000 description 11
- 230000008859 change Effects 0.000 description 8
- 230000003068 static effect Effects 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000007767 bonding agent Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
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- 230000006872 improvement Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000003902 lesion Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
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- 238000000429 assembly Methods 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
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- 230000020347 spindle assembly Effects 0.000 description 1
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Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
- F16C17/08—Sliding-contact bearings for exclusively rotary movement for axial load only for supporting the end face of a shaft or other member, e.g. footstep bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
- F16C27/08—Elastic or yielding bearings or bearing supports, for exclusively rotary movement primarily for axial load, e.g. for vertically-arranged shafts
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/4806—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
- G11B5/4813—Mounting or aligning of arm assemblies, e.g. actuator arm supported by bearings, multiple arm assemblies, arm stacks or multiple heads on single arm
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2370/00—Apparatus relating to physics, e.g. instruments
- F16C2370/12—Hard disk drives or the like
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Moving Of Heads (AREA)
- Support Of The Bearing (AREA)
- Rotational Drive Of Disk (AREA)
- Sliding-Contact Bearings (AREA)
- Springs (AREA)
- Mechanically-Actuated Valves (AREA)
- Threshing Machine Elements (AREA)
- Motor Or Generator Frames (AREA)
- Friction Gearing (AREA)
- Glass Compositions (AREA)
- Automatic Disk Changers (AREA)
Abstract
Description
Claims (16)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/446,381 US5835309A (en) | 1995-05-22 | 1995-05-22 | Pivot bearing |
US446381 | 1995-05-22 | ||
US446,381 | 1995-05-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1140876A CN1140876A (zh) | 1997-01-22 |
CN1091293C true CN1091293C (zh) | 2002-09-18 |
Family
ID=23772376
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN96104478A Expired - Fee Related CN1091293C (zh) | 1995-05-22 | 1996-04-26 | 轴承组件,使用其的电气马达,及旋转盘数据存储设备 |
Country Status (15)
Country | Link |
---|---|
US (4) | US5835309A (zh) |
EP (1) | EP0772872B1 (zh) |
JP (1) | JP3574263B2 (zh) |
KR (1) | KR100235886B1 (zh) |
CN (1) | CN1091293C (zh) |
AT (1) | ATE205325T1 (zh) |
CZ (1) | CZ9700045A3 (zh) |
DE (1) | DE69614966T2 (zh) |
ES (1) | ES2162073T3 (zh) |
HU (1) | HU221356B1 (zh) |
MY (1) | MY117717A (zh) |
PL (1) | PL180164B1 (zh) |
RU (1) | RU2137217C1 (zh) |
SG (1) | SG38936A1 (zh) |
WO (1) | WO1996037884A1 (zh) |
Families Citing this family (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3933762B2 (ja) * | 1997-08-29 | 2007-06-20 | 富士通株式会社 | ヘッドアクチュエータ及びディスク装置 |
US6078475A (en) * | 1997-10-08 | 2000-06-20 | International Business Machines Corporation | Low friction pivot for rotary actuator in disk drive |
US6191924B1 (en) * | 1997-10-16 | 2001-02-20 | Seagate Technology Llc | Bearing for an actuator of a disc drive |
EP0957480A1 (en) * | 1998-05-15 | 1999-11-17 | Deutsche Thomson-Brandt Gmbh | Disk drive with compensation of disk eccentricity |
US6411471B1 (en) | 1999-06-30 | 2002-06-25 | Seagate Technology Llc | Low friction bearing pivot for disc drive |
SG93243A1 (en) * | 1999-06-30 | 2002-12-17 | Seagate Technology Llc | Improved disc drive actuator latch system for high rotational shock |
WO2001006620A1 (de) * | 1999-07-17 | 2001-01-25 | Papst-Motoren Gmbh & Co. Kg | Elektrischer kleinmotor mit axiallager |
US6422080B1 (en) | 2000-02-07 | 2002-07-23 | Seagate Technology Llc | Resonance control method for a disc drive actuator assembly having discrete bearings |
US6560856B1 (en) | 2000-06-26 | 2003-05-13 | International Business Machines Corporation | Self-aligning fixture for pre-loading and aligning pivot bearing assemblies |
US6744605B2 (en) | 2001-04-10 | 2004-06-01 | Seagate Technology Llc | Low-profile pivot assembly |
JP2003013957A (ja) * | 2001-04-24 | 2003-01-15 | Ferrotec Corp | 磁性流体を使用したhdd用ピボット軸受 |
US6856491B1 (en) | 2001-11-30 | 2005-02-15 | Western Digital Technologies, Inc. | Pivot bearing cartridge including central pivot element and ball bearing set |
JP4105631B2 (ja) * | 2001-12-18 | 2008-06-25 | 三星ダイヤモンド工業株式会社 | チップ用ホルダー及びその製造方法並びにそのチップ用ホルダーを備えるスクライブ装置及び手動カッター |
US6713918B2 (en) * | 2002-05-20 | 2004-03-30 | Oliver Laing | Spherical bearing for electrical machines with permanent magnetic rotors |
US20040000824A1 (en) * | 2002-05-20 | 2004-01-01 | Laing Karsten A. | Electrical motor with spherically supported rotor |
US20040104631A1 (en) * | 2002-12-03 | 2004-06-03 | Tokyo Parts Industrial Co., Ltd. | Brushless vibration motor |
US7659648B2 (en) * | 2004-03-10 | 2010-02-09 | Comair Rotron Inc. | Motor with raised rotor |
KR100594273B1 (ko) * | 2004-05-07 | 2006-06-30 | 삼성전자주식회사 | 피봇축 고정 구조체와 이를 구비한 하드 디스크 드라이브 |
KR100872549B1 (ko) * | 2006-05-04 | 2008-12-08 | 엘지이노텍 주식회사 | 스핀들 모터 |
JP2008138736A (ja) * | 2006-11-30 | 2008-06-19 | Sii Micro Precision Kk | 軸受装置 |
US8270118B1 (en) | 2009-10-30 | 2012-09-18 | Western Digital Technologies, Inc. | Head stack assembly cartridge |
US8218256B1 (en) | 2009-10-30 | 2012-07-10 | Western Digital Technologies, Inc. | Disk spindle assembly cartridge |
US8432630B1 (en) | 2010-06-30 | 2013-04-30 | Western Digital Technologies, Inc. | Disk drive component test system |
JP5943549B2 (ja) * | 2011-02-24 | 2016-07-05 | 株式会社不二工機 | 電動弁 |
CN104343702A (zh) * | 2013-07-25 | 2015-02-11 | 纬创资通股份有限公司 | 风扇装置及电子装置 |
DE102014100377B3 (de) * | 2014-01-14 | 2014-12-24 | J.G.Anschütz GmbH & Co. KG | Abzugssystem einer Schusswaffe |
JP6275658B2 (ja) * | 2015-02-18 | 2018-02-07 | 日東電工株式会社 | 回路付サスペンション基板 |
PT3081816T (pt) * | 2015-04-13 | 2021-02-15 | Belenos Clean Power Holding Ag | Compressor com dois elementos esféricos de suporte do veio |
JP2018093575A (ja) * | 2016-11-30 | 2018-06-14 | 日本電産株式会社 | ステータユニットおよびモータ |
US10978099B2 (en) * | 2017-01-25 | 2021-04-13 | Galleon International Corporation | Bearing systems |
US10673297B2 (en) | 2017-12-11 | 2020-06-02 | Mcmillan Electric Company | Impact resistant electric motor |
US11096304B2 (en) | 2019-12-06 | 2021-08-17 | Hewlett-Packard Development Company, L.P. | Cages for electronic components |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0193699A1 (en) * | 1985-02-19 | 1986-09-10 | International Business Machines Corporation | Spindle shafts and method of attaching same to bearing assemblies |
EP0289135A1 (en) * | 1987-03-30 | 1988-11-02 | Seagate Technology, Inc. | Bi-compliant rotor stepper motor for an actuator in disc drives |
EP0599563A1 (en) * | 1992-11-23 | 1994-06-01 | Quantum Corporation | A low friction bearing |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1920546A (en) * | 1930-02-07 | 1933-08-01 | Brunner August Gottfried | Bearing support |
US2063787A (en) * | 1934-09-24 | 1936-12-08 | Torrington Co | Antifriction bearing and method of making the same |
US2216726A (en) | 1938-09-03 | 1940-10-08 | Alfred E Andersen | Bearing |
US2544166A (en) * | 1945-05-28 | 1951-03-06 | Landis & Gyr Ag | Meter bearing |
US3655226A (en) | 1970-08-03 | 1972-04-11 | C R C Ind | Bearing assembly |
US4265498A (en) * | 1979-04-06 | 1981-05-05 | Barry Wright Corporation | Thrust bearing |
NL8102522A (nl) * | 1981-05-22 | 1982-12-16 | Philips Nv | Zwenkarminrichting voor magneetschijfgeheugeninrichting. |
DE3447162A1 (de) | 1984-12-22 | 1986-07-03 | Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel | Vorrichtung zur lagerung von gewindespindeln |
JPS62124920U (zh) * | 1986-01-29 | 1987-08-08 | ||
JPS62255611A (ja) * | 1986-04-28 | 1987-11-07 | Toshiba Corp | 弾性軸受 |
US5051855A (en) * | 1986-10-02 | 1991-09-24 | Seagate Technology, Inc. | Rotary actuator |
JPH0417865Y2 (zh) * | 1986-12-15 | 1992-04-21 | ||
US4856918A (en) * | 1987-03-10 | 1989-08-15 | Nippon Seiko Kabushiki Kaisha | Bearing device |
US4865529A (en) * | 1987-12-03 | 1989-09-12 | Rockwell International Corporation | Rotor transient positioning assembly |
DE3930365A1 (de) | 1989-09-12 | 1991-03-21 | Fritz Stahlecker | Lagerung fuer einen oe-spinnrotor |
JPH07106044B2 (ja) | 1990-11-16 | 1995-11-13 | マブチモーター株式会社 | モータ出力軸位置決め装置 |
US5200866A (en) * | 1991-04-09 | 1993-04-06 | Digital Equipment Corporation | Motorized spindle for disk drive |
US5328272A (en) * | 1991-12-23 | 1994-07-12 | International Business Machines | Spindle system for a disk drive |
JPH05176520A (ja) * | 1991-12-25 | 1993-07-13 | Matsushita Electric Ind Co Ltd | ステッピングモータの軸受構造 |
US5291355A (en) | 1992-03-10 | 1994-03-01 | Nec Corporation | Micro miniature hard disk drive |
US5328271A (en) * | 1992-05-06 | 1994-07-12 | Maxtor Corporation | Hydrodynamic spindle bearing for ultra-slim disk storage unit |
US5486054A (en) * | 1993-09-03 | 1996-01-23 | Minebea Co., Ltd. | Bearing system in a motor for a floppy disk drive apparatus |
US5541460A (en) * | 1994-02-25 | 1996-07-30 | Seagate Technology, Inc. | Passive magnetic bearings for a spindle motor |
-
1995
- 1995-05-22 US US08/446,381 patent/US5835309A/en not_active Expired - Lifetime
-
1996
- 1996-03-12 SG SG1996006287A patent/SG38936A1/en unknown
- 1996-03-21 JP JP06440196A patent/JP3574263B2/ja not_active Expired - Fee Related
- 1996-04-26 CN CN96104478A patent/CN1091293C/zh not_active Expired - Fee Related
- 1996-04-26 MY MYPI96001613A patent/MY117717A/en unknown
- 1996-05-03 AT AT96919665T patent/ATE205325T1/de not_active IP Right Cessation
- 1996-05-03 DE DE69614966T patent/DE69614966T2/de not_active Expired - Lifetime
- 1996-05-03 WO PCT/EP1996/001859 patent/WO1996037884A1/en active IP Right Grant
- 1996-05-03 PL PL96318096A patent/PL180164B1/pl not_active IP Right Cessation
- 1996-05-03 KR KR1019960707570A patent/KR100235886B1/ko not_active IP Right Cessation
- 1996-05-03 ES ES96919665T patent/ES2162073T3/es not_active Expired - Lifetime
- 1996-05-03 CZ CZ199745A patent/CZ9700045A3/cs not_active IP Right Cessation
- 1996-05-03 EP EP96919665A patent/EP0772872B1/en not_active Expired - Lifetime
- 1996-05-03 HU HU9603626A patent/HU221356B1/hu not_active IP Right Cessation
- 1996-05-03 RU RU97102823A patent/RU2137217C1/ru not_active IP Right Cessation
- 1996-08-30 US US08/706,025 patent/US6222291B1/en not_active Expired - Fee Related
- 1996-08-30 US US08/707,813 patent/US5755518A/en not_active Expired - Lifetime
-
1998
- 1998-03-16 US US09/039,712 patent/US5938348A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0193699A1 (en) * | 1985-02-19 | 1986-09-10 | International Business Machines Corporation | Spindle shafts and method of attaching same to bearing assemblies |
EP0289135A1 (en) * | 1987-03-30 | 1988-11-02 | Seagate Technology, Inc. | Bi-compliant rotor stepper motor for an actuator in disc drives |
EP0599563A1 (en) * | 1992-11-23 | 1994-06-01 | Quantum Corporation | A low friction bearing |
Also Published As
Publication number | Publication date |
---|---|
DE69614966D1 (de) | 2001-10-11 |
EP0772872B1 (en) | 2001-09-05 |
US6222291B1 (en) | 2001-04-24 |
EP0772872A1 (en) | 1997-05-14 |
JP3574263B2 (ja) | 2004-10-06 |
PL180164B1 (pl) | 2000-12-29 |
SG38936A1 (en) | 1997-04-17 |
CZ289021B6 (cs) | 2001-10-17 |
CN1140876A (zh) | 1997-01-22 |
US5835309A (en) | 1998-11-10 |
HUP9603626A3 (en) | 2000-03-28 |
CZ9700045A3 (cs) | 2001-10-17 |
ATE205325T1 (de) | 2001-09-15 |
HU221356B1 (en) | 2002-09-28 |
KR100235886B1 (ko) | 1999-12-15 |
US5755518A (en) | 1998-05-26 |
JPH08321145A (ja) | 1996-12-03 |
MY117717A (en) | 2004-07-31 |
DE69614966T2 (de) | 2002-04-11 |
HU76462A2 (en) | 1997-09-29 |
RU2137217C1 (ru) | 1999-09-10 |
PL318096A1 (en) | 1997-05-12 |
ES2162073T3 (es) | 2001-12-16 |
WO1996037884A1 (en) | 1996-11-28 |
US5938348A (en) | 1999-08-17 |
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Legal Events
Date | Code | Title | Description |
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