Inventor
SIMPSON ADAM
CA20 patents
⚠️ This page may combine multiple inventors who share the name “SIMPSON ADAM”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ETAGEN INC
7 patentsUS9567898B2Feb 14, 2017
High-efficiency linear combustion engine
ETAGEN INC5 citations84
US10738688B2Aug 11, 2020
Energy storage and conversion in free-piston combustion engines
ETAGEN INC3 citations83
US9719415B2Aug 1, 2017
Energy storage and conversion in free-piston combustion engines
ETAGEN INC5 citations83
US10851708B2Dec 1, 2020
High-efficiency linear combustion engine
ETAGEN INC2 citations73
US10221759B2Mar 5, 2019
High-efficiency linear combustion engine
ETAGEN INC2 citations73
US10024231B2Jul 17, 2018
High-efficiency linear combustion engine
ETAGEN INC2 citations73
US10190490B2Jan 29, 2019
Energy storage and conversion in free-piston combustion engines
ETAGEN INC0 citations51
MAINSPRING ENERGY INC
7 patentsUS11525391B2Dec 13, 2022
High-efficiency linear generator
MAINSPRING ENERGY INC2 citations73
US11578646B2Feb 14, 2023
Energy storage and conversion in linear generators
MAINSPRING ENERGY INC2 citations72
US12473855B2Nov 18, 2025
Energy storage and conversion in linear generators
MAINSPRING ENERGY INC0 citations62
US12421890B2Sep 23, 2025
High-efficiency linear generator
MAINSPRING ENERGY INC0 citations62
US12000331B2Jun 4, 2024
High-efficiency linear generator
MAINSPRING ENERGY INC0 citations62
US11867116B2Jan 9, 2024
Energy storage and conversion in linear generators
MAINSPRING ENERGY INC0 citations62
US11352947B2Jun 7, 2022
Energy storage and conversion in linear generators
MAINSPRING ENERGY INC0 citations62
SIMPSON ADAM
4 patentsUS8662029B2Mar 4, 2014
High-efficiency linear combustion engine
SIMPSON ADAM10 citations91
US8413617B2Apr 9, 2013
High-efficiency two-piston linear combustion engine
SIMPSON ADAM32 citations91
US8402931B2Mar 26, 2013
High-efficiency linear combustion engine
SIMPSON ADAM16 citations91
US8453612B2Jun 4, 2013
High-efficiency linear combustion engine
SIMPSON ADAM1 citations45