Granted Patent
Utility
US 4,730,293 · App. 06/907,956
Dual beam optical data system
Inventors:
Gerald A. Pierce, Louis F. Schaefer, Norman A. Peppers, William F. Mullen
Patented Case
View Patent ↗
Granted: Mar 8, 1988
Filed: Sep 15, 1986
Inventors
Gerald A. Pierce
Louis F. Schaefer
Norman A. Peppers
William F. Mullen
Assignee (at issue)
Drexler Technology 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.