Inventor · disambiguated record
Marshall Duffield
Also filed as: DUFFIELD MARSHALL · DUFFIELD MARSHALL D
9 granted patents·6 pending applications·61 citations·filing 2000–2020
87Inventor score
Top patents by PatentIndex Score
15 records- 0193US11447946B2Portable shelterDUFFIELD MARINE INC·Filed 2020·Granted Sep 20, 2022·6 cites·21 claims
- 0281US8002141B2Waterproof storage unitDUFFIELD MARINE INC·Filed 2008·Granted Aug 23, 2011·7 cites·3 claims
- 0381US7806661B2PropellerDUFFIELD MARINE INC·Filed 2008·Granted Oct 5, 2010·11 cites·19 claims
- 0480US10190310B2Waterproof storage unitDUFFIELD MARINE INC·Filed 2016·Granted Jan 29, 2019·5 cites·7 claims
- 0572US7506605B2Boat window systemDUFFIELD MARSHALL·Filed 2008·Granted Mar 24, 2009·6 cites·3 claims
- 0665US7415938B2Boat window systemDUFFIELD MARSHALL·Filed 2005·Granted Aug 26, 2008·4 cites·1 claims
- 0761USD575219SBoat propellerDUFFIELD MARSHALL·Filed 2007·Granted Aug 19, 2008·13 cites·1 claims
- 0854US2013312345A1Waterproof storage unitDUFFIELD MARINE INC·Filed 2013·Application pending·0 cites
- 0953US6503109B1Swivel drive assemblyFiled 2000·Granted Jan 7, 2003·9 cites·15 claims
- 1053US2006273698A1Waterproof storage unitDUFFY ELECTRIC BOAT CO·Filed 2005·Application pending·0 cites
- 1151US2015068136A1Waterproof storage unitDUFFIELD MARINE INC·Filed 2014·Application pending·0 cites
- 1249US2010101476A1Boat window systemDUFFIELD MARSHALL·Filed 2008·Application pending·0 cites
- 1347US8240269B2Boat window systemDUFFIELD MARSHALL·Filed 2011·Granted Aug 14, 2012·0 cites·3 claims
- 1447US2011203199A1Waterproof storage unitDUFFIELD MARSHALL·Filed 2011·Application pending·0 cites
- 1541US2006275131A1PropellerDUFFY ELECTRIC BOAT CO·Filed 2005·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →