Patent US 4952919A
Patent number | US 4952919A (click link for details and documents via Google Patents) |
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Title | Trackball mechanism |
Inventors | Reuben E. Nippoldt |
Company | Tektronix Inc |
Filing date | 1989-04-06 |
Grant date | 1990-08-28 |
Patent number | US 4952919A (click link for details and documents via Google Patents) |
---|---|
Title | Trackball mechanism |
Inventors | Reuben E. Nippoldt |
Company | Tektronix Inc |
Filing date | 1989-04-06 |
Grant date | 1990-08-28 |