Harkness; Joseph R.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Harkness; Joseph R..The latest application filed is for "engine balancing system having at least one pivoting counterbalance weight".
- Harkness; Joseph R. - Germantown WI
| Patent | Date |
|---|---|
| Engine balancing system having at least one pivoting counterbalance weight Grant 5,282,397 - Harkness , et al. February 1, 1 | 1994-02-01 |
| Internal combustion engine Grant D308,871 - Harkness , et al. June 26, 1 | 1990-06-26 |
| Internal combustion engine Grant D308,872 - Harkness , et al. June 26, 1 | 1990-06-26 |
| Pivoting balancer system Grant 4,819,593 - Bruener , et al. April 11, 1 | 1989-04-11 |
| Brake safety system for a power driven rotary mower Grant 4,090,345 - Harkness May 23, 1 | 1978-05-23 |
| Brake safety system for a power driven rotary mower Grant 4,037,389 - Harkness July 26, 1 | 1977-07-26 |
| Safety device for walk-behind rotary mowers Grant 4,003,190 - Braun , et al. January 18, 1 | 1977-01-18 |
| Automatic compression relief mechanism for internal combustion engines Grant 3,981,289 - Harkness September 21, 1 | 1976-09-21 |
| Electric motor armature core Grant 3,882,336 - Boyd , et al. May 6, 1 | 1975-05-06 |
| Controlled Vibration Absorbing Mounting For Engines Grant 3,841,425 - Harkness October 15, 1 | 1974-10-15 |
| Assembly Of Alternator Magnet Blocks With Engine Flywheel Grant 3,828,212 - Harkness , et al. August 6, 1 | 1974-08-06 |
| Method Of Making An Assembly Of Alternator Magnet Blocks With Engine Flywheel Grant 3,818,586 - Harkness , et al. June 25, 1 | 1974-06-25 |
| Safe Start System For Riding Mowers Grant 3,782,084 - Harkness January 1, 1 | 1974-01-01 |
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