IP Library › Granted Patent US 4,277,312
Granted Patent Utility
US 4,277,312 · App. 06/187,301

Ascension pipe cleaning apparatus

Inventors: James F. McKenna, Douglas O. Anderson
Patented Case View Patent ↗
Granted: Jul 7, 1981 Filed: Sep 15, 1980
Inventors
James F. McKenna
Douglas O. Anderson
Assignee (at issue)
United States Steel Corporation

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Quick Facts
Patent No.
US 4,277,312
App. No.
06/187,301
Filed
1980-09-15
Granted
1981-07-07
Kind
A