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USPTO Patent Rankings Data through Dec 31, 2025
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Ian M. Williamson — 12 Patents

STStackhouse: 3 patents #3 of 21Top 15%
Redondo Beach, CA: #108 of 1,594 inventorsTop 7%
California: #51,404 of 386,348 inventorsTop 15%
Overall (All Time): #396,045 of 4,157,543Top 10%
12 Patents All Time
Ian M. Williamson has been granted 12 US patents while listed as an inventor at Stackhouse. The first was granted in 1988 and the most recent in July 1993. Ian M. Williamson ranks #396,045 of 4,157,543 US inventors in our database (top 9.5%). Patent records list Ian M. Williamson in Redondo Beach, CA, US.

Issued Patents All Time

Showing 1–12 of 12 patents

Patent #TitleCo-InventorsDate
5226939 Surgical smoke evacuation system Ed F. Nicolas 1993-07-13
5046492 Clean room helmet system Wyman H. Stackhouse 1991-09-10
5042474 Self-contained clean room respiration system with breathed air exhausting 1991-08-27
4986282 Face shield system Wyman H. Stackhouse 1991-01-22
D306363 Face shield Wyman H. Stackhouse 1990-02-27
4901716 Clean room helmet system Wyman H. Stackhouse 1990-02-20
D304854 Portable air filter Wyman H. Stackhouse 1989-11-28
D304612 Laser smoke particulate/odor filter unit for use in surgical environments Wyman H. Stackhouse 1989-11-14
D303166 Clean room safety hood Wyman H. Stackhouse 1989-08-29
4826513 Laser smoke particulate/odor filter system Wyman H. Stackhouse 1989-05-02
4810269 Point one micron filtering system Wyman H. Stackhouse 1989-03-07
D298473 Filtration unit for exhaust air from a clean room helmet worn for a sterile environment or the like Wyman H. Stackhouse 1988-11-08