Granted Patent
Utility
US 5,914,495 · App. 08/823,415
Inspection apparatus for inspecting a defect of an optical disc
Inventors:
Shigeki Ishizuka, Koichi Sato, Akira Nikami, Mitsuru Sato, Yoshitake Yanagisawa
Patented Case
View Patent ↗
Granted: Jun 22, 1999
Filed: Mar 25, 1997
Inventors
Shigeki Ishizuka
Koichi Sato
Akira Nikami
Mitsuru Sato
Yoshitake Yanagisawa
Assignee (at issue)
SONY GROUP 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.