David L. Hendren — 4 Patents at Simplexgrinnell Lp

David L. Hendren has been granted 4 US patents while listed as an inventor at Simplexgrinnell Lp. The first was granted in 1994 and the most recent in December 2008. David L. Hendren ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list David L. Hendren in Reading, OH, US.

Patents per Year

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
7471049	Optical element driving circuit	Kenneth E. Savage, Jr.	2008-12-30
7456585	Optical element driving circuit	Kenneth E. Savage, Jr.	2008-11-25
D377418	Toothbrush holder	—	1997-01-21
D351047	Dental floss dispenser	—	1994-09-27