Michael J. Grajewski — 2 Patents at 3Si Security Systems

Michael J. Grajewski has been granted 2 US patents while listed as an inventor at 3Si Security Systems. The first was granted in 1998 and the most recent in February 2007. Michael J. Grajewski ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Michael J. Grajewski in Pottstown, PA, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
7183915	Wireless ATM security system	Joel Bartholf, Mitchell Lee Ingle	2007-02-27
5734325	Alarm device	Raymond C. Johnson, Walter K. Layfield, Michael Epple, Gregory J. Burns, James J. Walker	1998-03-31

Michael J. Grajewski — 2 Patents

Issued Patents All Time

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