MD

Marshall Duffield

DM Duffield Marine: 5 patents #1 of 3Top 35%
📍 Newport Beach, CA: #253 of 1,653 inventorsTop 20%
🗺 California: #66,801 of 386,348 inventorsTop 20%
Overall (All Time): #557,652 of 4,157,543Top 15%
9
Patents All Time

Issued Patents All Time

Showing 1–9 of 9 patents

Patent #TitleCo-InventorsDate
11447946 Portable shelter 2022-09-20
10190310 Waterproof storage unit 2019-01-29
8240269 Boat window system 2012-08-14
8002141 Waterproof storage unit 2011-08-23
7806661 Propeller 2010-10-05
7506605 Boat window system 2009-03-24
7415938 Boat window system 2008-08-26
D575219 Boat propeller 2008-08-19
6503109 Swivel drive assembly Jack A Heiser 2003-01-07