Haffner; Donald G.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Haffner; Donald G..The latest application filed is for "lawn mower catcher".
- Haffner; Donald G. - Glendale WI
- Haffner; Donald G. - Greendale WI
- Haffner; Donald G. - Racine WI
| Patent | Date |
|---|---|
| Combined lawn mower and grass catcher Grant 4,149,362 - Haffner , et al. April 17, 1 | 1979-04-17 |
| Lawn mower catcher Grant 4,149,363 - Woelffer , et al. April 17, 1 | 1979-04-17 |
| Controls for a sod cutter blade Grant 3,913,682 - Kaercher, Jr. , et al. October 21, 1 | 1975-10-21 |
| Torsion spring counterbalance for a lawn mower Grant 3,905,180 - Akgulian , et al. September 16, 1 | 1975-09-16 |
| Safety grip for powered implement Grant 3,875,819 - Haffner April 8, 1 | 1975-04-08 |
| Sod Cutter Blade Mounting Grant 3,856,090 - Haffner , et al. December 24, 1 | 1974-12-24 |
| Lawn Mowers Articularly Supported On A Tractor Grant 3,808,778 - Hoffmeyer , et al. May 7, 1 | 1974-05-07 |
| Lawn Mower And Bag Catcher Assembly Grant 3,805,499 - Woelffer , et al. April 23, 1 | 1974-04-23 |
| Convertible Gang Lawn Mower Grant 3,731,469 - Akgulian , et al. May 8, 1 | 1973-05-08 |
| Lawn Mower Adjustable Skid Assembly Grant 3,672,696 - Akgulian , et al. June 27, 1 | 1972-06-27 |
| Gang Lawn Mower With Self-sharpening Means Grant 3,668,844 - Akgulian , et al. June 13, 1 | 1972-06-13 |
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