IP Library › Granted Patent US 4,179,196
Granted Patent Utility
US 4,179,196 · App. 05/838,178

Compact subjective refractive instrument

Inventors: Staffan Persson, Robert B. Tackaberry
Patented Case View Patent ↗
Granted: Dec 18, 1979 Filed: Sep 30, 1977
Inventors
Staffan Persson
Robert B. Tackaberry
Assignee (at issue)
American Optical Corporation

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Quick Facts
Patent No.
US 4,179,196
App. No.
05/838,178
Filed
1977-09-30
Granted
1979-12-18
Kind
A