Heffner, Steven P.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Heffner, Steven P..The latest application filed is for "drive system".
- Heffner, Steven P. - La Grange IL
| Patent | Date |
|---|---|
| Drive system App 20040159047 - Heffner, Steven P. ; et al. | 2004-08-19 |
| Transit vehicle door operator and lock Grant 6,739,092 - Heffner , et al. May 25, 2 | 2004-05-25 |
| Tandem sliding door operator App 20020184823 - Heffner, Steven P. ; et al. | 2002-12-12 |
| Tandem sliding door operator Grant 6,446,389 - Heffner , et al. September 10, 2 | 2002-09-10 |
| Drive system App 20020092236 - Heffner, Steven P. ; et al. | 2002-07-18 |
| Lock assembly Grant 6,139,073 - Heffner , et al. October 31, 2 | 2000-10-31 |
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