Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Rangasami S. Chandra — 6 Patents

FMFmc: 5 patents #241 of 1,735Top 15%
Walnut Creek, CA: #302 of 1,300 inventorsTop 25%
California: #94,478 of 386,348 inventorsTop 25%
Overall (All Time): #779,687 of 4,157,543Top 20%
6 Patents All Time
Rangasami S. Chandra has been granted 6 US patents while listed as an inventor at Fmc. The first was granted in 1985 and the most recent in December 1992. Rangasami S. Chandra ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list Rangasami S. Chandra in Walnut Creek, CA, US.

Patents per Year

Patents granted per year, 1985 to 1992Bar chart with a peak of 3 patents in 1985.peak 31985: 3 patents19851986: 2 patents19861992: 1 patents1992

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
5170352 Multi-purpose autonomous vehicle with path plotting Louis S. McTamaney, Yue Min Wong, Robert A. Walker, Jorge E. Lastra, Paul Wagner +2 more 1992-12-08 $9,374,000
4622635 Portable display and control terminal for wells José Fernando Reyes 1986-11-11 $319,000
4594665 Well production control system Stephen G. Quen, Donald E. Eineichner, Jorge E. Lastra 1986-06-10 $1,542,000
4561299 Apparatus for detecting changes in inclination or acceleration Franklin P. Orlando, Joseph S. Goulart 1985-12-31 $5,307,000
4553872 Load cell clamping apparatus Franklin P. Orlando 1985-11-19 $2,386,000
4509365 Method and apparatus for weighing a sucker-rod pumped well Donald E. Eineichner, James M. Tucci 1985-04-09 $5,392,000