IP Library › Granted Patent US 4,976,285
Granted Patent Utility
US 4,976,285 · App. 07/530,773

Universal self-venting drain valve

Inventors: John F. Church, Victor R. Oelschlaegel, J. Donald Emery
Patented Case View Patent ↗
Granted: Dec 11, 1990 Filed: May 30, 1990
Inventors
John F. Church
Victor R. Oelschlaegel
J. Donald Emery
Assignee (at issue)
Parker-Hannifin Corporation

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Quick Facts
Patent No.
US 4,976,285
App. No.
07/530,773
Filed
1990-05-30
Granted
1990-12-11
Kind
A