Granted Patent
Utility
US 4,120,610 · App. 05/470,520
Helicopter blade structure
Inventors:
James L. Braswell, Jr., Cecil E. Covington, Nolan B. Phillips, David Snyder
Patented Case
View Patent ↗
Granted: Oct 17, 1978
Filed: May 16, 1974
Inventors
James L. Braswell, Jr.
Cecil E. Covington
Nolan B. Phillips
David Snyder
Assignee (at issue)
Textron 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.