Inventor
Ronald D. Ingraham
Inventor
Reed City, MI, US
Overview
Patents· 17 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B60Tprimary
B60TVehicle brake control systems or parts thereof9%
H03KPulse technique9%
F02DControlling combustion engines7%
F02PIgnition, other than compression ignition, for internal-combustion engines7%
G01LMeasuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure7%
B60GVehicle suspension arrangements4%
B60KArrangement or mounting of propulsion units or of transmissions in vehicles4%
B60QArrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general4%
F02BInternal-combustion piston engines4%
F02NStarting of combustion engines4%
PatentTitleYear
5,861,802'Fifth wheel hitch coupling control system'19995,789,915'Magnetic field energy responsive position sensing apparatus and method'19985,570,666'Glow plug controller'19965,477,675'Fluid power assist method and apparatus'19955,413,072'Vehicle starter and electrical system protection'19955,287,831'Vehicle starter and electrical system protection'19945,270,645'Linear-output, temperature-stable rotational sensor including magnetic field responsive device disposed within a cavity of a flux concentrator'19935,229,579'Motor vehicle heated seat control'19935,217,280'Pressure sensitive signal device for vehicle brake pedal'19935,137,338'Combination vehicular braking and accessory control system'19925,087,825'Capacity responsive keyboard'19925,010,972'Combination vehicular braking and accessory control system'19914,978,177'Signal mechanism responsive to force applied to vehicular brake pedal and the like'19904,831,279'Capacity responsive control circuit'19894,758,735'DC touch control switch circuit'19884,731,548'Touch control switch circuit'19884,672,278'Antenna relay method and apparatus'1987Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1987–1998Patents assigned to NARTRON CORP (16)· patent assignee history
1987–1992Based in Quincy, MI, US· patent location history
1990–1999Based in Reed City, MI, US· patent location history
1999Patents assigned to HOLLAND HITCH CO (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| NARTRON CORP | 16 | 1987–1998 |
| HOLLAND HITCH CO | 1 | 1999 |
Locations
| Location | Patents | Span |
|---|---|---|
| Reed City, MI, US | 12 | 1990–1999 |
| Quincy, MI, US | 5 | 1987–1992 |