Granted Patent
Utility
US 4,121,415 · App. 05/766,399
Hybrid horological display using time modulation
Inventors:
William C. Crutcher, Leo Wiesner
Patented Case
View Patent ↗
Granted: Oct 24, 1978
Filed: Feb 7, 1977
Inventors
William C. Crutcher
Leo Wiesner
Assignee (at issue)
Timex 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.