John D. Fourdraine — 4 Patents at Control Data

John D. Fourdraine has been granted 4 US patents while listed as an inventor at Control Data. The first was granted in 1989 and the most recent in May 2001. John D. Fourdraine ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list John D. Fourdraine in Toronto, ON, CA.

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
6233804	Tool for clinching two members together	—	2001-05-22
4958371	Method and apparatus for determining when a telephone handset is off-hook	Joseph A. Damoci, Matthew F. Kern, Russell J. Welsh	1990-09-18
4955070	Apparatus and method for automatically monitoring broadcast band listening habits	Russell J. Welsh	1990-09-04
4845741	Modem ringing supression circuit	—	1989-07-04

John D. Fourdraine — 4 Patents

Issued Patents All Time

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