IP Library › Granted Patent US 5,117,878
Granted Patent Utility
US 5,117,878 · App. 07/697,517

Drainfield funnel

Inventors: Mark D. Shaw, J. Tad Heyman, Laurence M. Bierce
Patented Case View Patent ↗
Granted: Jun 2, 1992 Filed: Apr 29, 1991
Inventors
Mark D. Shaw
J. Tad Heyman
Laurence M. Bierce

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Quick Facts
Patent No.
US 5,117,878
App. No.
07/697,517
Filed
1991-04-29
Granted
1992-06-02
Kind
A