Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
RD

Robert A. DiFrancesco — 4 Patents

AMAmoco: 1 patents #610 of 1,251Top 50%
GSGene-Trak Systems: 1 patents #4 of 17Top 25%
LULucigen: 1 patents #6 of 17Top 40%
PAPharmacia Biotech Aktiebolag: 1 patents #15 of 37Top 45%
Auburn, MA: #29 of 113 inventorsTop 30%
Massachusetts: #27,912 of 88,656 inventorsTop 35%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
Robert A. DiFrancesco has been granted 4 US patents while listed as an inventor at Amoco. The first was granted in 1992 and the most recent in January 2012. Robert A. DiFrancesco ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Robert A. DiFrancesco in Auburn, MA, US.

Patents per Year

Patents granted per year, 1992 to 2012Bar chart with a peak of 1 patents in 1992.peak 11992: 1 patents19921996: 1 patents19961997: 1 patents19972012: 1 patents2012

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
8093030 Thermostable viral polymerases and methods of use Thomas William Schoenfeld, Vinay K. Dhodda, David A. Mead 2012-01-10
RE35443 Purification of Q Beta replicase Karin Borcherts Mahdavie 1997-02-04
5565318 Room temperature stable reagent semi-spheres David Winter Walker, Jean A. Heaster, James F. Jolly, Chris Lively, Suzanne B. Treml 1996-10-15 $17,284,000
5141857 Purification of Q Beta replicase 1992-08-25