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

Robert Hefner — 5 Patents

Caterpillar: 3 patents #2,186 of 8,398Top 30%
SGSchunk Carbon Technology Gmbh: 1 patents #4 of 13Top 35%
EAE.I. Du Pont De Nemours And: 1 patents #9,950 of 12,129Top 85%
Sussex, WI: #48 of 229 inventorsTop 25%
Wisconsin: #9,126 of 40,088 inventorsTop 25%
Overall (All Time): #907,971 of 4,157,543Top 25%
5 Patents All Time
Robert Hefner has been granted 5 US patents while listed as an inventor at Caterpillar. The first was granted in 1984 and the most recent in August 2018. Robert Hefner ranks #907,971 of 4,157,543 US inventors in our database (top 21.8%). Patent records list Robert Hefner in Sussex, WI, US.

Patents per Year

Patents granted per year, 1984 to 2018Bar chart with a peak of 1 patents in 1984.peak 11984: 1 patents19841987: 1 patents19871992: 1 patents19922002: 1 patents20022018: 1 patents2018

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
10051717 Electrostatic noise grounding system for use in a wind turbine and a rotor and wind turbine comprising the same Kenneth McKay 2018-08-14
6389343 Steering resistance device Kevin Huang, John J. Krone, Andrew H. Nippert 2002-05-14 $14,593,000
5109696 Powertrain performance assessment system Irving Bright, Ronald C. Erickson, Dennis K. Greene, Gerald D. Hardy, Lowell E. Johnson +2 more 1992-05-05 $18,077,000
4694928 Operator restraint system James C. Barton, Paul A. Reid, Frank R. Sable 1987-09-22 $11,993,000
4485220 Polyoxazoline modified unsaturated polyesteramides Robert E. Hefner, Jr. 1984-11-27 $4,999,000