D. Max Harshbarger — 2 Patents at 3M

D. Max Harshbarger has been granted 2 US patents while listed as an inventor at 3M. The first was granted in 2000 and the most recent in February 2003. D. Max Harshbarger ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list D. Max Harshbarger in Hudson, WI, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
6521834	Fire stopping cover plate for fire stopping electrical outlets and switches	Michael G. Dykhoff, Robert J. Boros	2003-02-18	$14,780,000
6153668	Low density fire barrier material and method of making	Robert E. Gestner	2000-11-28	$41,581,000

D. Max Harshbarger — 2 Patents

Issued Patents All Time

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