Granted Patent
Utility
US 5,147,136 · App. 07/702,869
Temperature cycling test chambers
Inventors:
Jeffrey W. Hartley, Burch E. Zelner
Patented Case
View Patent ↗
Granted: Sep 15, 1992
Filed: May 20, 1991
Inventors
Jeffrey W. Hartley
Burch E. Zelner
Assignee (at issue)
Crane Plastics Company LLC
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.