Inventor
DEGRAAFF DAVID
US19 patents
⚠️ This page may combine multiple inventors who share the name “DEGRAAFF DAVID”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MAINSPRING ENERGY INC
9 patentsUS11616428B2Mar 28, 2023
Linear electromagnetic machine system
MAINSPRING ENERGY INC6 citations83
US11404937B2Aug 2, 2022
Integrated linear generator system
MAINSPRING ENERGY INC11 citations83
US11236827B2Feb 1, 2022
Piston-integrated gap cover
MAINSPRING ENERGY INC1 citations62
US12556063B2Feb 17, 2026
Integrated linear generator system
MAINSPRING ENERGY INC0 citations60
US12445029B2Oct 14, 2025
Linear electromagnetic machine with a stator having stator teeth arranged to provide an anti-clocking force
MAINSPRING ENERGY INC0 citations60
US12027956B2Jul 2, 2024
Integrated linear generator system
MAINSPRING ENERGY INC0 citations60
US11750065B2Sep 5, 2023
Integrated linear generator system
MAINSPRING ENERGY INC0 citations60
US12255514B2Mar 18, 2025
Systems and methods for flexure-based bearing mounting
MAINSPRING ENERGY INC0 citations56
US11976730B2May 7, 2024
Manifold interface seal
MAINSPRING ENERGY INC0 citations53
SUNPOWER CORP
4 patentsUS11316057B2Apr 26, 2022
Shingled solar cells overlapping along non-linear edges
SUNPOWER CORP0 citations60
US10804698B2Oct 13, 2020
Device and method for electrically decoupling a solar module from a solar system
SUNPOWER CORP0 citations51
US9742190B2Aug 22, 2017
Device and method for electrically decoupling a solar module from a solar system
SUNPOWER CORP0 citations51
US10741703B2Aug 11, 2020
Shingled solar cells overlapping along non-linear edges
SUNPOWER CORP0 citations50