McNamara; David A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for McNamara; David A..The latest application filed is for "method and apparatus for determining engine oil change intervals according to actual engine use".
- McNamara; David A. - Saline MI
- McNamara; David A. - Ypsilanti MI
| Patent | Date |
|---|---|
| Method and apparatus for determining engine oil change intervals according to actual engine use Grant 5,060,156 - Vajgart , et al. October 22, 1 | 1991-10-22 |
| Programmable key and improved lock assembly Grant 5,003,801 - Stinar , et al. April 2, 1 | 1991-04-02 |
| Circuit for converting pressure variation to frequency variation Grant 4,446,447 - McNamara May 1, 1 | 1984-05-01 |
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