Granted Patent
Utility
US 4,806,034 · App. 07/154,302
Write head controller with grid synchronization
Inventor:
William T. Plummer
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: Feb 10, 1988
Inventor
William T. Plummer
Assignee (at issue)
Polaroid 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.