Inventor
Robert J. Bridigum
Inventor
Plum Borough, PA, US
Overview
Patents· 6 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B60Tprimary
B60TVehicle brake control systems or parts thereof75%
Y10TTechnical subjects covered by former us classification25%
PatentTitleYear
4,453,779'Adjustable variable load control valve device'19844,404,987'Cap nut for a trip cock device including a detent arrangement for overriding automatic reset'19834,045,093'Dynamic blending with a spring-applied fluid pressure released service brake including cojoint spring and fluid pressure emergency feature'19774,037,880'Emergency brake valve device for propogating an emergency brake application'19774,026,609'Pressure reduction and pressure reduction rate sensitive emergency vent valve'19774,014,580'Emergency brake valve device for railway vehicles'1977Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1977Patents assigned to WESTINGHOUSE AIR BRAKE CO (4)· patent assignee history
1977–1984Based in Plum Borough, PA, US· patent location history
1983–1984Patents assigned to AMERICAN STANDARD INC (2)· patent assignee history
1983Based in Penn Hills Township, Allegheny County, PA, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| WESTINGHOUSE AIR BRAKE CO | 4 | 1977 |
| AMERICAN STANDARD INC | 2 | 1983–1984 |
Locations
| Location | Patents | Span |
|---|---|---|
| Plum Borough, Pennsylvania, US | 5 | 1977–1984 |
| Penn Hills Township, Allegheny County, Pennsylvania, US | 1 | 1983 |