Inventor
Duane D. Robertson
Inventor
Golden, CO, US
Overview
Patents· 9 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
F16Lprimary
F16LPipes36%
B26DCutting21%
B26BHand-held cutting tools not otherwise provided for14%
B23DPlaning7%
LOCD07%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests7%
Y10TTechnical subjects covered by former us classification7%
PatentTitleYear
6,810,587'Combined clamping and cutting tool for plastic pipes'20046,370,780'Spring-biased cutting tool for plastic pipes'20026,318,761'Replacement fitting for rigid, plastic pipes'20015,487,571'Pipe fitting'19964,956,916'Cutting tool'19904,789,189'Pipe saddle'1988D0266736'Cutting tool for flexible plastic conduit'19824,336,652'Cutting tool for flexible plastic conduit'19823,980,325'Fitting for flexible plastic pipe'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–2002Patents assigned to ROBERTSON DUANE D (7)· patent assignee history
1976–1990Based in Denver, CO, US· patent location history
1982–2004Based in Golden, CO, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| ROBERTSON DUANE Dself | 7 | 1976–2002 |
Locations
| Location | Patents | Span |
|---|---|---|
| Golden, CO, US | 6 | 1982–2004 |
| Denver, CO, US | 3 | 1976–1990 |