Granted Patent
Utility
US 4,444,471 · App. 06/357,838
Variable focus lens system employing elastomeric lens
Inventors:
John W. Ford, Howard G. Rogers, Christy Thomas
Patented Case
View Patent ↗
Granted: Apr 24, 1984
Filed: Mar 12, 1982
Inventors
John W. Ford
Howard G. Rogers
Christy Thomas
Assignee (at issue)
Polaroid 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.