Inventor
Masayasu Fujisawa
Inventor
Kanagawa, JP
Overview
Patents· 14 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G11Bprimary
G11BInformation storage based on relative movement between record carrier and transducer41%
Y10TTechnical subjects covered by former us classification23%
B08BCleaning in general9%
B24CAbrasive or related blasting with particulate material9%
B24BMachines, devices, or processes for grinding or polishing5%
B28DWorking stone or stone-like materials5%
G01BMeasuring length, thickness or similar linear dimensions5%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%
PatentTitleYear
6,690,544'Magnetic head and magnetic head manufacturing method'20046,504,680'Magnetic head and magnetic head manufacturing method'20036,278,582'Magnetic head and magnetic head manufacturing method'20016,219,200'Thin film magnetic head with air bearing end face of magnetic film protruding beyond air bearing end face of substrate'20016,198,601'Thin film magnetic head having non-linear tapered rails'20016,188,546'Method of electrically connecting a magnetic head, a magnetic head body and a magnetic disc apparatus'20015,947,796'Method of fine grain milling and machine therefor'19995,910,864'Thin film magnetic head having non-linear rails'19995,567,333'Thin film magnetic head, process for production thereof'19965,560,743'Method of fine grain milling and machine therefor'19965,456,736'Lap and lapping liquor'19955,371,582'Thickness/depth measuring apparatus and method for measuring the thickness of a film and the depth of a groove'19945,349,745'Method of fabricating thin-film magnetic head'19944,712,535'Method and apparatus for severing wafers'1987Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1987–2004Patents assigned to HITACHI LTD (13)· patent assignee history
1987–1994Based in Ninomiya, JP· patent location history
1994–2004Based in Kanagawa, JP· patent location history
1996–2001Based in Naka-gun, JP· patent location history
2001Patents assigned to HIATCHI LTD (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 13 | 1987–2004 |
| HIATCHI LTD | 1 | 2001 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kanagawa, JP | 9 | 1994–2004 |
| Naka-gun, JP | 3 | 1996–2001 |
| Ninomiya, JP | 2 | 1987–1994 |