Granted Patent
Utility
US 4,489,894 · App. 06/352,452
Inductively charged spraying apparatus
Inventors:
John A. Marchant, John Hughes
Patented Case
View Patent ↗
Granted: Dec 25, 1984
Filed: Feb 25, 1982
Inventors
John A. Marchant
John Hughes
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT CORPORATION
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.