Granted Patent
Utility
US 4,923,420 · App. 07/317,371
Method of manufacturing ceramic translucent material
Inventors:
Gijsbertus De With, Hendricus J. A. Van Dijk
Patented Case
View Patent ↗
Granted: May 8, 1990
Filed: Mar 1, 1989
Inventors
Gijsbertus De With
Hendricus J. A. Van Dijk
Assignee (at issue)
U.S. Philips 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.