Granted Patent
Utility
US 4,023,378 · App. 05/601,576
Refrigeration system incorporating a single air circulation means for a combination refrigerated display case and walk-in cooler
Inventors:
Thomas E. Kennedy, Earl E. Butts, Melvin W. Steelman
Patented Case
View Patent ↗
Granted: May 17, 1977
Filed: Aug 1, 1975
Inventors
Thomas E. Kennedy
Earl E. Butts
Melvin W. Steelman
Assignee (at issue)
Tyler Refrigeration 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.