Inventor
Dennis W. Crawford
Inventor
Pontiac, MI, US
Overview
Patents· 7 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E03Cprimary
E03CDomestic plumbing installations for fresh water or waste water45%
Y10TTechnical subjects covered by former us classification27%
F16KValves18%
G05DSystems for controlling or regulating non-electric variables9%
PatentTitleYear
4,899,397'Aspirator for a tub/shower diverter assembly'19904,798,221'Self sealing anti-knock diverter valve'19894,747,428'Faucet nut having an integral flared flange'19884,562,960'Pressure responsive aerator'19864,218,785'Drain assembly for a lavatory basin'19804,219,184'Faucet valve assembly with friction drag'19804,037,624'Spout assembly'1977Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1977–1980Patents assigned to BRISTOL PROD (3)· patent assignee history
1977–1990Based in Pontiac, MI, US· patent location history
1986–1990Patents assigned to MASCO CORP (4)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| MASCO CORP | 4 | 1986–1990 |
| BRISTOL PROD | 3 | 1977–1980 |
Locations
| Location | Patents | Span |
|---|---|---|
| Pontiac, MI, US | 7 | 1977–1990 |