The Best Patent Web Sites

Cornell Patent Office

More Patent Databases

Patent Searching Prior to 1976

Prior to 1976 patents searching is a bit complicated. While full-text should be available in Google Patents, some has been scanned with OCR - optical character recognition - and there are numerous spelling errors. The print indexes below may be helpful in these cases:

Engineering Librarian

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Jill Powell
103A Carpenter Hall
Engineering Library
Cornell University
Ithaca, NY 14853
Subjects: Engineering