Granted Patent
Utility
US 4,841,124 · App. 07/042,859
Strain-resistant heated helicopter rotor blade
Inventors:
Duncan B. Cox deceased, Martin Schuyler
Patented Case
View Patent ↗
Granted: Jun 20, 1989
Filed: Apr 27, 1987
Inventors
Duncan B. Cox deceased
Martin Schuyler
Assignee (at issue)
Cox & Company, 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.