IP Library › Granted Patent US 4,782,421
Granted Patent Utility
US 4,782,421 · App. 06/838,812

Electrical supply line protection apparatus

Inventors: Allan T. Johns, Raj K. Aggarwal
Patented Case View Patent ↗
Granted: Nov 1, 1988 Filed: Mar 11, 1986
Inventors
Allan T. Johns
Raj K. Aggarwal
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT CORPORATION

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Quick Facts
Patent No.
US 4,782,421
App. No.
06/838,812
Filed
1986-03-11
Granted
1988-11-01
Kind
A