U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

"Radio has no future."

Lord Kelvin, British mathematician and physicist ; 1897

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

Inventor: Charles C. Hansen, Sr.

Address: Marlton, NJ
No. of patents: 1
Last patent issue date: 07/30/1985

Number	Title	Issue Date
4531826	Event counter and access controller An event counter and access controller system has a central processor unit, memory storage, and operator's keyboard, display, badge reader and key switch. The system may operate in a normal mode, wherein copy pulses from a photocopier, for example, are co...	07/30/1985