IP Library Granted Patent US 4,243,870
Granted Patent Utility
US 4,243,870 · App. 05/876,467

Vaporizer with electrode housing interlock

Inventors: Thomas E. Grime, Frank A. Robinson
Patented Case View Patent ↗
Granted: Jan 6, 1981 Filed: Feb 9, 1978
Inventors
Thomas E. Grime
Frank A. Robinson
Assignee (at issue)
Champion Spark Plug Company

This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.

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Quick Facts
Patent No.
US 4,243,870
App. No.
05/876,467
Filed
1978-02-09
Granted
1981-01-06
Kind
A