IP Library › Granted Patent US 4,042,401
Granted Patent Utility
US 4,042,401 · App. 05/553,134

Hectograph products and process

Inventors: Douglas A. Newman, Robert T. Emerson
Patented Case View Patent ↗
Granted: Aug 16, 1977 Filed: Feb 26, 1975
Inventors
Douglas A. Newman
Robert T. Emerson
Assignee (at issue)
Columbia Ribbon & Carbon Mfg. Co., Inc.

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Quick Facts
Patent No.
US 4,042,401
App. No.
05/553,134
Filed
1975-02-26
Granted
1977-08-16
Kind
A