Inventor
Frank J. Walker
Inventor
Miami, FL, US
Overview
Patents· 9 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling19%
F02BInternal-combustion piston engines19%
Y10TTechnical subjects covered by former us classification13%
A63BApparatus for physical training, gymnastics, swimming, climbing, or fencing6%
B42FSheets temporarily attached together6%
B60RVehicles, vehicle fittings, or vehicle parts, not otherwise provided for6%
B62JCycle saddles or seats6%
F01MLubricating of machines or engines in general6%
H01HElectric switches6%
H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers6%
PatentTitleYear
5,222,867'Method and system for controlling a mechanical pump to monitor and optimize both reservoir and equipment performance'19935,096,323'Prong type stacked paper fastener'19925,063,775'Method and system for controlling a mechanical pump to monitor and optimize both reservoir and equipment performance'19915,006,044'Method and system for controlling a mechanical pump to monitor and optimize both reservoir and equipment performance'19914,754,106'Double cammed push-button switch and methodology for operation of the same'19884,123,621'Acoustical speaker device'1978D0247562'Ceiling speaker'19783,975,018'Racket construction'19763,955,648'Removable type lubricating fitting'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1992Patents assigned to WALKER FRANK J (4)· patent assignee history
1976–1993Patents assigned to WALKER JR FRANK J (4)· patent assignee history
1976–1993Patents assigned to WALKER SR FRANK J (4)· patent assignee history
1976–1993Based in Miami, FL, US· patent location history
1978Patents assigned to LIVINGSTON DAVID M (1)· patent assignee history
1978Based in West Bloomfield, MI, US· patent location history
1978Based in Southfield, MI, US· patent location history
1988Patents assigned to SYMBOLIC DISPLAYS INC (1)· patent assignee history
1988Based in Huntington Beach, CA, US· patent location history
1992Based in Miami Shores, FL, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| WALKER FRANK Jself | 4 | 1976–1992 |
| WALKER JR FRANK J | 4 | 1976–1993 |
| WALKER SR FRANK Jself | 4 | 1976–1993 |
| LIVINGSTON DAVID M | 1 | 1978 |
| SYMBOLIC DISPLAYS INC | 1 | 1988 |
Locations
| Location | Patents | Span |
|---|---|---|
| Miami, Florida, US | 5 | 1976–1993 |
| Miami Shores, Florida, US | 1 | 1992 |
| Huntington Beach, California, US | 1 | 1988 |
| West Bloomfield, MI, US | 1 | 1978 |
| Southfield, MI, US | 1 | 1978 |