Granted Patent
Utility
US 5,236,495 · App. 07/747,978
Calcium phosphate type glass-ceramic
Inventors:
Tsuneo Manabe, Hirosi Usui, Yasuko Osaki
Patented Case
View Patent ↗
Granted: Aug 17, 1993
Filed: Aug 21, 1991
Inventors
Tsuneo Manabe
Hirosi Usui
Yasuko Osaki
Assignee (at issue)
ASAHI GLASS CO., LTD.
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.