Masao Kawagishi
5Patents
4h-index
13Co-inventors
43Inventor score
Filing activity: Apr 10, 1987 → Feb 10, 1989
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4803575A | Tape cassettes having bottom grooves for use in tape recorder having bottom projection in cassette holder | Physics | 25 | Expired |
| US4844377A | Tape cassette | Physics | 23 | Expired |
| US5023739A | Tape cassette with a trapping layer having a corrosiveness which is equal to or higher than that of the magnetic recording layer on the tape | Physics | 13 | Expired |
| US4809113A | Tape cassette with improved cover structure | Physics | 8 | Expired |
| US4866376A | Cross-oil instrument having testing apparatus for vehicular sensor disconnection indication | Physics | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.