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Ernest L. Stech — 4 Patents

FDFrost Engineering Development: 4 patents #2 of 4Top 50%
Littleton, CO: #416 of 1,939 inventorsTop 25%
Colorado: #10,815 of 40,980 inventorsTop 30%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
Ernest L. Stech has been granted 4 US patents while listed as an inventor at Frost Engineering Development. The first was granted in 1989 and the most recent in July 1992. Ernest L. Stech ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Ernest L. Stech in Littleton, CO, US.

Patents per Year

Patents granted per year, 1989 to 1992Bar chart with a peak of 1 patents in 1989.peak 11989: 1 patents19891990: 1 patents19901991: 1 patents19911992: 1 patents1992

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
5131491 Descent controller Horace M. Varner, Richard H. Frost 1992-07-21
5038888 Descent controller Horace M. Varner, Richard H. Frost 1991-08-13
4938435 Personnel lowering device Horace M. Varner 1990-07-03
4883146 Descent control device with deadman brake Horace M. Varner 1989-11-28

Frequent Collaborators

Horace M. Varner4 shared
Richard H. Frost2 shared

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