Granted Patent
Utility
US 4,515,867 · App. 06/420,495
Method for ablating a coded marking into a glass workpiece and product thereof
Inventors:
John N. Bleacher, Barry Michael Cushman
Patented Case
View Patent ↗
Granted: May 7, 1985
Filed: Sep 20, 1982
Inventors
John N. Bleacher
Barry Michael Cushman
Assignee (at issue)
RCA 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.