Peter C. Spellar — 4 Patents at Frick

Peter C. Spellar has been granted 4 US patents while listed as an inventor at Frick. The first was granted in 1985 and the most recent in July 1987. Peter C. Spellar ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Peter C. Spellar in Hagerstown, MD, US.

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
4678406	Variable volume ratio screw compressor with step control	Joseph W. Pillis, David A. Murphy, Paul Nemit, Jr.	1987-07-07
4548549	Micro-processor control of compression ratio at full load in a helical screw rotary compressor responsive to compressor drive motor current	David A. Murphy	1985-10-22
4519748	Micro-processor control of compression ratio at full load in a helical screw rotary compressor responsive to compressor drive motor current	David A. Murphy	1985-05-28
4516914	Micro-processor control of moveable slide stop and a moveable slide valve in a helical screw rotary compressor	David A. Murphy	1985-05-14

Peter C. Spellar — 4 Patents

Issued Patents All Time

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