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USPTO Patent Rankings Data through Dec 31, 2025
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Roberta Shafer — 1 Patent

SPSpectra-Physics: 1 patents #113 of 257Top 45%
Milpitas, CA: #2,175 of 3,192 inventorsTop 70%
California: #249,524 of 386,348 inventorsTop 65%
Overall (All Time): #2,406,284 of 4,157,543Top 60%
1 Patents All Time
Roberta Shafer has been granted 1 US patent while listed as an inventor at Spectra-Physics. All of these patents were granted in 1990. Roberta Shafer ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list Roberta Shafer in Milpitas, CA, US.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4905161 Flow stability reporting system for a liquid chromatography system Les Miller 1990-02-27