Granted Patent
Utility
US 4,557,028 · App. 06/490,254
Composite inflatable crown roll
Inventor:
Werner W. Eibe
Patented Case
View Patent ↗
Granted: Dec 10, 1985
Filed: May 2, 1983
Inventor
Werner W. Eibe
Assignee (at issue)
White Consolidated Industries, 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.