Springer; Donald A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Springer; Donald A..The latest application filed is for "food preparation process".
- Springer; Donald A. - North Ridge CA
- Springer; Donald A. - San Jose CA
| Patent | Date |
|---|---|
| Food preparation process Grant 4,323,110 - Rubbright , et al. April 6, 1 | 1982-04-06 |
| Food preparation apparatus Grant 4,254,824 - Springer March 10, 1 | 1981-03-10 |
| Food serving tray for use in a food preparation unit Grant 4,232,789 - Springer November 11, 1 | 1980-11-11 |
| Food preparation apparatus and process Grant 4,203,486 - Rubbright , et al. May 20, 1 | 1980-05-20 |
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