Granted Patent
Utility
US 4,413,249 · App. 06/359,852
Vehicle fuel-efficiency warning device
Inventors:
Yoshio Ohtani, Michio Wakiya, Todomu Kakishima
Patented Case
View Patent ↗
Granted: Nov 1, 1983
Filed: Mar 19, 1982
Inventors
Yoshio Ohtani
Michio Wakiya
Todomu Kakishima
Assignee (at issue)
Diesel Kiki Co., Ltd.
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.