Inventor
Roy P. Crawford
Inventor
Saratoga, CA, US
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G11Bprimary
G11BInformation storage based on relative movement between record carrier and transducer33%
C30BSingle-crystal growth17%
F04BPositive-displacement machines for liquids17%
F16CShafts17%
Y10TTechnical subjects covered by former us classification17%
PatentTitleYear
8,257,496'Crucible weight measurement system for controlling feedstock introduction in Czochralski crystal growth'20125,328,270'Hydrodynamic pump'19944,585,397'Dual bellows pump with drive circuit through bellows'19864,334,656'Automatic tape threading apparatus for magnetic tape transports'1982Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1982–1994Patents assigned to IBM (3)· patent assignee history
1982–2012Based in Saratoga, CA, US· patent location history
2012Patents assigned to BENDER DAVID L (1)· patent assignee history
2012Patents assigned to CRAWFORD ROY P (1)· patent assignee history
2012Patents assigned to JANIK GARY (1)· patent assignee history
2012Patents assigned to SMITH DAVID E A (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| IBM | 3 | 1982–1994 |
| BENDER DAVID L | 1 | 2012 |
| CRAWFORD ROY Pself | 1 | 2012 |
| JANIK GARY | 1 | 2012 |
| SMITH DAVID E A | 1 | 2012 |
Locations
| Location | Patents | Span |
|---|---|---|
| Saratoga, California, US | 4 | 1982–2012 |