Granted Patent
Utility
US 4,647,769 · App. 06/609,224
Optical encoder having controllable lead-lag phase trim sensitivity
Inventors:
Thomas R. Stone, Randolph H. Graham
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: May 11, 1984
Inventors
Thomas R. Stone
Randolph H. Graham
Assignee (at issue)
Quantum Corporation
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.