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David V. Schaefer — 4 Patents

JCJ. I. Case: 1 patents #133 of 306Top 45%
TCTenneco Automotive Operating Company: 1 patents #372 of 591Top 65%
Burlington, WI: #48 of 182 inventorsTop 30%
Wisconsin: #10,875 of 40,088 inventorsTop 30%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
David V. Schaefer has been granted 4 US patents while listed as an inventor at J. I. Case. The first was granted in 1981 and the most recent in September 1989. David V. Schaefer ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list David V. Schaefer in Burlington, WI, US.

Patents per Year

Patents granted per year, 1981 to 1989Bar chart with a peak of 1 patents in 1981.peak 11981: 1 patents19811982: 1 patents19821987: 1 patents19871989: 1 patents1989

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
4862765 Creeper installation method and apparatus Richard J. Honeyager 1989-09-05
4704777 Creeper installation method and apparatus Richard J. Honeyager 1987-11-10
4343386 Ball movement coordinator and cam member for torque responsive hub clutch Clark J. Hamkins 1982-08-10 $15,262,000
4262785 Torque responsive hub clutch Larry B. Anderson, Clark J. Hamkins, Harry A. Petrak 1981-04-21

Frequent Collaborators

Clark J. Hamkins2 shared
Richard J. Honeyager2 shared
Larry B. Anderson1 shared
Harry A. Petrak1 shared

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Sandra Bittorf4
Aviel FOGEL4
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