Granted Patent
Utility
US 5,696,780 · App. 08/680,576
Frequency conversion system
Inventors:
Jan-Willem Pieterse, James D. Kafka, Shinan S. Sheng, William L. Nighan, Jr.
Patented Case
View Patent ↗
Granted: Dec 9, 1997
Filed: Jul 12, 1996
Inventors
Jan-Willem Pieterse
James D. Kafka
Shinan S. Sheng
William L. Nighan, Jr.
Assignee (at issue)
Spectra Physics Lasers, Inc.
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.