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USPTO Patent Rankings Data through Dec 31, 2025
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Darrell E. Pierson — 7 Patents

WNWeyerhaeuser Nr: 6 patents #59 of 578Top 15%
CMCoe Manufacturing: 1 patents #8 of 29Top 30%
Federal Way, WA: #59 of 444 inventorsTop 15%
Washington: #14,787 of 76,902 inventorsTop 20%
Overall (All Time): #680,018 of 4,157,543Top 20%
7 Patents All Time
Darrell E. Pierson has been granted 7 US patents while listed as an inventor at Weyerhaeuser Nr. The first was granted in 1980 and the most recent in September 1991. Darrell E. Pierson ranks #680,018 of 4,157,543 US inventors in our database (top 16.4%). Patent records list Darrell E. Pierson in Federal Way, WA, US.

Patents per Year

Patents granted per year, 1980 to 1991Bar chart with a peak of 3 patents in 1980.peak 31980: 3 patents19801982: 1 patents19821983: 2 patents19831991: 1 patents1991

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
5048581 Veneer tenderizer apparatus and process Edward L. Snellgrove 1991-09-17 $18,709,000
4420510 Method for applying a foamed adhesive under start-stop conditions Arden L. Kunkel 1983-12-13 $23,827,000
4380259 Veneer lathe apparatus and method using independently adjustable powered back-up roll Byron B. Brookhyser, Robert H. Lichtenwalter, Arthur L. McGee 1983-04-19
4342348 Veneer lathe chuck assembly Robert H. Lichtenwalter 1982-08-03 $18,889,000
4193207 Method for veneer drying Richard C. Allen 1980-03-18 $21,909,000
4192079 Veneer drying and handling Byron B. Brookhyser 1980-03-11 $21,951,000
4188730 Method for veneer redrying and handling Richard C. Allen 1980-02-19 $8,655,000