Granted Patent
Utility
US 4,812,699 · App. 07/117,328
Drive control device in an ultrasonic vibration motor
Inventors:
Hidehiro Ogawa, Kazuyuki Kazami
Patented Case
View Patent ↗
Granted: Mar 14, 1989
Filed: Nov 6, 1987
Inventors
Hidehiro Ogawa
Kazuyuki Kazami
Assignee (at issue)
NIKON 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.