IP Library › Granted Patent US 4,170,021
Granted Patent Utility
US 4,170,021 · App. 05/863,107

Electronic article with orientation-identifying surface shape

Inventors: Loring E. Du Bois, Lawrence D. Simpson
Patented Case View Patent ↗
Granted: Oct 2, 1979 Filed: Dec 22, 1977
Inventors
Loring E. Du Bois
Lawrence D. Simpson
Assignee (at issue)
Western Electric Company, Inc.

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Quick Facts
Patent No.
US 4,170,021
App. No.
05/863,107
Filed
1977-12-22
Granted
1979-10-02
Kind
A