Heil; Donald J.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Heil; Donald J..The latest application filed is for "dental handpiece".
- Heil; Donald J. - Lake Villa IL
| Patent | Date |
|---|---|
| Dental handpiece App 20070031786 - Heil; Donald J. | 2007-02-08 |
| Dental handpiece with spring grip chuck and lever release mechanism Grant 5,040,980 - Heil August 20, 1 | 1991-08-20 |
| Quick connect/disconnect coupling for dental handpieces Grant 5,039,304 - Heil August 13, 1 | 1991-08-13 |
| Dental handpiece connector assembly with replaceable air-cooled lamp and insertion/extraction tool therefor Grant 5,033,960 - Heil July 23, 1 | 1991-07-23 |
| Spring grip chuck assembly for dental handpieces Grant 4,089,115 - Heil , et al. May 16, 1 | 1978-05-16 |
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