Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Randall E. Zipser — 5 Patents

SPSperry: 4 patents #87 of 841Top 15%
NANew Holland North America: 1 patents #157 of 281Top 60%
Clovis, CA: #29 of 230 inventorsTop 15%
California: #107,996 of 386,348 inventorsTop 30%
Overall (All Time): #907,971 of 4,157,543Top 25%
5 Patents All Time
Randall E. Zipser has been granted 5 US patents while listed as an inventor at Sperry. The first was granted in 1981 and the most recent in April 1998. Randall E. Zipser ranks #907,971 of 4,157,543 US inventors in our database (top 21.8%). Patent records list Randall E. Zipser in Clovis, CA, US.

Patents per Year

Patents granted per year, 1981 to 1998Bar chart with a peak of 3 patents in 1981.peak 31981: 3 patents19811984: 1 patents19841998: 1 patents1998

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
5738380 Fuel fill device for tractors Dennis L. White, Edward J. Hines 1998-04-14
4474522 Apparatus for powering a bale wagon tier-tying device 1984-10-02 $3,694,000
4305690 Delivery tray return mechanism for a bale wagon L. Dennis Butler, Donald M. Grey, H. Berton Stringfellow 1981-12-15 $2,081,000
4289436 Delivery tray release mechanism for a bale wagon H. Berton Stringfellow 1981-09-15 $1,735,000
4282969 Material moving apparatus for a bale wagon 1981-08-11 $1,562,000