Granted Patent
Utility
US 5,136,985 · App. 07/758,026
Boiler tube support
Inventor:
Robert James Krowech
Patented Case
View Patent ↗
Granted: Aug 11, 1992
Filed: Sep 12, 1991
Inventor
Robert James Krowech
Assignee (at issue)
Deltak 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.