MacDonald; John B.
Patent Applications and Registrations
Patent applications and USPTO patent grants for MacDonald; John B..The latest application filed is for "barrier system and barrier units therefor".
- MacDonald; John B. - Brantford CA
- Macdonald; John B. - West Windsor Township Mercer County
- MacDonald; John B. - Dedham MA
- MacDonald; John B. - Boston MA
| Patent | Date |
|---|---|
| Barrier system and barrier units therefor Grant 5,213,312 - MacDonald May 25, 1 | 1993-05-25 |
| Lightpen control circuit Grant 4,697,175 - Macdonald September 29, 1 | 1987-09-29 |
| Portable emergency alarm transmitter Grant D277,465 - MacDonald February 5, 1 | 1985-02-05 |
| Vector generator for computer graphics Grant 4,365,305 - MacDonald , et al. December 21, 1 | 1982-12-21 |
| Powder dispenser Grant D263,120 - Fossella , et al. February 23, 1 | 1982-02-23 |
| Portable programmer for programmable controller Grant D255,116 - MacDonald , et al. May 27, 1 | 1980-05-27 |
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