Granted Patent
Utility
US 5,325,926 · App. 08/014,441
Reversible casing for a down-the-hole percussive apparatus
Inventors:
Warren T. Lay, Leland H. Lyon
Patented Case
View Patent ↗
Granted: Jul 5, 1994
Filed: Feb 5, 1993
Inventors
Warren T. Lay
Leland H. Lyon
Assignee (at issue)
Ingersoll-Rand Company
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.