IP Library › Granted Patent US 4,405,701
Granted Patent Utility
US 4,405,701 · App. 06/419,644

Methods of fabricating a photomask

Inventors: Edward L. Banks, Bruce E. Truax, Laurence Watkins
Patented Case View Patent ↗
Granted: Sep 20, 1983 Filed: Sep 17, 1982
Inventors
Edward L. Banks
Bruce E. Truax
Laurence Watkins
Assignee (at issue)
Western Electric Company, Inc.

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 4,405,701
App. No.
06/419,644
Filed
1982-09-17
Granted
1983-09-20
Kind
A