Clifford; Douglas M.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Clifford; Douglas M..The latest application filed is for "adaptable programmed calculator including a percent keyboard operator".
- Clifford; Douglas M. - Loveland CO
| Patent | Date |
|---|---|
| Adaptable programmed calculator including a percent keyboard operator Grant 4,181,966 - Wenninger , et al. January 1, 1 | 1980-01-01 |
| Programmable calculator employing a read-write memory having a movable boundary between program and data storage sections thereof Grant 4,089,059 - Miller , et al. May 9, 1 | 1978-05-09 |
| Adaptable programmed calculator having provision for plug-in keyboard and memory modules Grant 3,971,925 - Wenninger , et al. July 27, 1 | 1976-07-27 |
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