Granted Patent
Utility
US 4,325,575 · App. 05/781,696
Hoisting coupling for concrete slabs
Inventors:
Jack A. Holt, Robert Lathrop, Philip A. Torbet
Patented Case
View Patent ↗
Granted: Apr 20, 1982
Filed: Mar 28, 1977
Inventors
Jack A. Holt
Robert Lathrop
Philip A. Torbet
Assignee (at issue)
Burke, Inc.
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.