Brea, California
United States
4
2025-02-11
The entities that hold a legal rights for patent applications filed by inventor Beard Douglas W.:
Douglas W. Beard from Brea, US has applied for patents for these inventions. The list has both pending applications and granted patents:
Linear grease and hydraulic valve for fracking system maintenance
#2 | 2023-07-13Hydraulic control components for oil well blowout preventers
#3 | 2020-12-10Lockout for hydraulic rotary valve in control system for oil well blow-out preventer
#4 | 2020-10-29Hydraulic control components for oil well blowout preventers
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