Granted Patent
Utility
US 4,807,614 · App. 07/147,279
Protective hood
Inventors:
Carl-Ernst van der Smissen, Holmer Rohling
Patented Case
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Granted: Feb 28, 1989
Filed: Jan 22, 1988
Inventors
Carl-Ernst van der Smissen
Holmer Rohling
Assignee (at issue)
DRAGERWERK AKTIEGESELLSCHAFT
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.