Granted Patent
Utility
US 4,201,527 · App. 05/920,686
Apparatus for manufacturing tubular thermoplastic
Inventors:
David A. Verner, Henry A. Kipp
Patented Case
View Patent ↗
Granted: May 6, 1980
Filed: Jun 30, 1978
Inventors
David A. Verner
Henry A. Kipp
Assignee (at issue)
Egan Machinery 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.