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Willis Oil Tool Co.
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Long Beach, CA, US
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Patents Grants
last 30 patents
Information
Patent Grant
Pig ball transfer unit
Patent number
4,199,834
Issue date
Apr 29, 1980
Willis Oil Tool Co.
John D. Muchow
F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS
Information
Patent Grant
Automatic reset pilot valve
Patent number
4,116,215
Issue date
Sep 26, 1978
Willis Oil Tool Co.
John D. Muchow
G05 - CONTROLLING REGULATING
Information
Patent Grant
Actuator pilot for fluid pressure monitoring safety system
Patent number
4,026,326
Issue date
May 31, 1977
Willis Oil Tool Co.
Richard E. Wells
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Device and method for launching and/or retrieving pipeline scrapers
Patent number
4,016,621
Issue date
Apr 12, 1977
Willis Oil Tool Co.
Maurice Slegers
B08 - CLEANING
Information
Patent Grant
Fluid pressure monitoring safety system
Patent number
4,017,053
Issue date
Apr 12, 1977
Willis Oil Tool Co.
Richard E. Wells
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Means to reset an actuator pilot valve
Patent number
3,977,438
Issue date
Aug 31, 1976
Willis Oil Tool Co.
John D. Muchow
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Safety shut-off valve
Patent number
3,958,592
Issue date
May 25, 1976
Willis Oil Tool Co.
Richard E. Wells
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Patents Applications
last 30 patents
Trademark
last 30 trademarks
Information
Trademark
73119074 - W
Serial number
73119074
Registration number
1175775
Filing date
Mar 14, 1977
Willis Oil Tool Co.
6 - Common metals and their alloys