Inventor
Masamichi Hayakawa
Inventor
Nagano, JP
Overview
Patents· 18 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
F16Cprimary
F16CShafts36%
G11BInformation storage based on relative movement between record carrier and transducer15%
H02KDynamo-electric machines13%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests8%
C10MLubricating compositions5%
C10NIndexing scheme associated with subclass c10m relating to lubricating compositions5%
G02BOptical elements, systems or apparatus5%
G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices5%
C07CAcyclic or carbocyclic compounds3%
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients3%
PatentTitleYear
10,921,544Lens apparatus and imaging apparatus20217,858,287'Photosensitive resin, and photosensitive composition'20106,448,383'Method for producing 1,2-naphthoquinonediazide photosensitive agent'20026,402,385'Dynamic pressure bearing apparatus'20026,302,586'Fluid sealing device for use with a motor for rotating a disc drive'20016,296,391'Hydrodynamic bearing apparatus'20016,244,749'Dynamic pressure bearing device and method for manufacturing same'20016,155,721'Dynamic-pressure fluid bearing'20006,147,424'Gas dynamic pressure bearing apparatus'20005,828,795'Sealing device for use in a motor'19985,806,987'Hydrodynamic bearing apparatus'19985,791,785'Hydrodynamic bearing apparatus'19985,789,836'Motor having dynamic pressure bearing device'19985,743,656'Hydrodynamic bearing apparatus and method for manufacturing same'19985,629,274'Lubricating fluid composition for dynamic pressure bearing'19975,628,569'Fluid bearing unit and manufactured method thereof'19975,627,147'Lubricating fluid composition for dynamic pressure bearing'19975,599,864'Polyarylene sulfide resin composition and optical pick-up parts formed from the same'1997Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1997–2002Patents assigned to SANKYO SEIKI SEISAKUSHO KK (13)· patent assignee history
1997Patents assigned to TAIHO IND CO (2)· patent assignee history
1997–2001Based in Nagano, JP· patent location history
1997–2002Based in Suwa, JP· patent location history
2001Patents assigned to SANKYO SEIKI SESAKUSHO KK (1)· patent assignee history
2002–2010Based in Chiba, JP· patent location history
2010Patents assigned to HYOGO PREFECTURE (1)· patent assignee history
2021Patents assigned to CANON KK (1)· patent assignee history
2021Based in Utsunomiya, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SANKYO SEIKI SEISAKUSHO KK | 13 | 1997–2002 |
| TAIHO IND CO | 2 | 1997 |
| CANON KK | 1 | 2021 |
| HYOGO PREFECTURE | 1 | 2010 |
| SANKYO SEIKI SESAKUSHO KK | 1 | 2001 |
Locations
| Location | Patents | Span |
|---|---|---|
| Nagano, JP | 10 | 1997–2001 |
| Suwa, JP | 5 | 1997–2002 |
| Chiba, JP | 2 | 2002–2010 |
| Utsunomiya, JP | 1 | 2021 |