Granted Patent
Utility
US 5,943,639 · App. 08/545,504
Displacement detection apparatus including an error correction system
Inventors:
Takashi Tanaka, Masaaki Kusumi
Patented Case
View Patent ↗
Granted: Aug 24, 1999
Filed: Oct 19, 1995
Inventors
Takashi Tanaka
Masaaki Kusumi
Assignee (at issue)
Sony Magnescale 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.