Granted Patent
Utility
US 5,049,421 · App. 07/304,358
Transducer glass bonding technique
Inventor:
William Stephen Kosh
Patented Case
View Patent ↗
Granted: Sep 17, 1991
Filed: Jan 30, 1989
Inventor
William Stephen Kosh
Assignee (at issue)
Dresser Industries, 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.