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Robert W. Simpson — 5 Patents

CECelotex: 1 patents #48 of 77Top 65%
FLFoseco International Limited: 1 patents #68 of 196Top 35%
Richlands, VA: #4 of 33 inventorsTop 15%
Virginia: #6,255 of 34,511 inventorsTop 20%
Overall (All Time): #907,971 of 4,157,543Top 25%
5 Patents All Time
Robert W. Simpson has been granted 5 US patents while listed as an inventor at Celotex. The first was granted in 1989 and the most recent in April 2018. Robert W. Simpson ranks #907,971 of 4,157,543 US inventors in our database (top 21.8%). Patent records list Robert W. Simpson in Richlands, VA, US.

Patents per Year

Patents granted per year, 1989 to 2018Bar chart with a peak of 1 patents in 1989.peak 11989: 1 patents19891993: 1 patents19932000: 1 patents20002001: 1 patents20012018: 1 patents2018

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
9932720 Excavator shearing implement — 2018-04-03
6286580 Sand reclamation Stuart P. Ward 2001-09-11
6030559 Method for the continuous manufacture of plastic foam Leon F. Barry 2000-02-29
5273092 Device for storing and installing vehicular tire chains — 1993-12-28
4877616 Process for preparing xerosin II and xerosin III, improved biological response modifiers Elizabeth S. Boylan, Robert J. Boylan, Vincent Groupe 1989-10-31

Frequent Collaborators

Stuart P. Ward1 shared
Leon F. Barry1 shared
Robert J. Boylan1 shared
Vincent Groupe1 shared
Elizabeth S. Boylan1 shared

Nearby-Ranked Inventors

Joseph L. Mann5
Terry Richard Linn5
Ikuo DEGUCHI5
Swapnil Kumar5
Zachary W. Gyugyi5
Xiaoxue CHEN5
Mohankumar Krishnan VALIYAMBATH5
Baoquan Tan5
Jack Long5