Granted Patent
Utility
US 4,972,088 · App. 07/328,418
Register mark detection
Inventors:
John H. Weyer, Jeffrey Isherwood
Patented Case
View Patent ↗
Granted: Nov 20, 1990
Filed: Mar 24, 1989
Inventors
John H. Weyer
Jeffrey Isherwood
Assignee (at issue)
Crosfield Electronics Limited
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.