I have three patents through my employment at Polaroid and Xerox. These links will take you to the US Patent and Trademark Office web site, and will bring up the text of these patents:
The mobility cane was actually mentioned in the New York Times.
A couple of my other "creative ideas" at Xerox have been described in the Xerox Disclosure Bulletin, but were not considered patent material. Excerpts of these concepts are listed by Priorartdatabase.com at the following sites: