Inventor
MARTENS GRANT M
US47 patents
Patents
47 patentsUS10821338B2Nov 3, 2020
Striking face deflection structures in a golf club
ACUSHNET CO29 citations94
US10384105B2Aug 20, 2019
Golf club with interchangeable sole
ACUSHNET CO18 citations94
US10099092B2Oct 16, 2018
Golf club with flexure
ACUSHNET CO20 citations94
US10065088B2Sep 4, 2018
Golf club having double-walled striking face
ACUSHNET CO37 citations94
US10029161B2Jul 24, 2018
Golf club having removable weight
ACUSHNET CO40 citations94
US9839820B2Dec 12, 2017
Golf club head with flexure
ACUSHNET CO26 citations94
US9526956B2Dec 27, 2016
Golf club head
ACUSHNET CO53 citations94
US11202946B2Dec 21, 2021
Golf club having a damping element for ball speed control
ACUSHNET CO30 citations93
US10463933B2Nov 5, 2019
Weighted iron set
ACUSHNET CO13 citations92
US12161920B2Dec 10, 2024
Weighted iron set
ACUSHNET CO4 citations86
US11478684B2Oct 25, 2022
Weighted iron set
ACUSHNET CO6 citations86
US11186016B2Nov 30, 2021
Golf club head having multi-material face and method of manufacture
ACUSHNET CO10 citations86
US10843046B2Nov 24, 2020
Golf club with flexure
ACUSHNET CO14 citations86
US10625124B2Apr 21, 2020
Golf club with flexure
ACUSHNET CO14 citations86
US10583334B2Mar 10, 2020
Golf club having a low modulus crown
ACUSHNET CO12 citations86
US11801428B2Oct 31, 2023
Golf club having a damping element for ball speed control
ACUSHNET CO5 citations85
US11077340B2Aug 3, 2021
Golf club having a low modulus crown
ACUSHNET CO5 citations84
US10881924B2Jan 5, 2021
Weighted iron set
ACUSHNET CO8 citations84
US10357697B2Jul 23, 2019
Weighted iron set
ACUSHNET CO11 citations84
US10343032B2Jul 9, 2019
Golf club with flexure
ACUSHNET CO12 citations84
US10307649B1Jun 4, 2019
Multi-material iron golf club head
ACUSHNET CO7 citations84
US10137342B2Nov 27, 2018
Golf club having removeable weight
ACUSHNET CO14 citations84
US9421433B2Aug 23, 2016
Golf club head with flexure
ACUSHNET CO16 citations84
US11826620B2Nov 28, 2023
Golf club having a damping element for ball speed control
ACUSHNET CO6 citations75
US11786789B2Oct 17, 2023
Golf club having a damping element for ball speed control
ACUSHNET CO7 citations75
US12226679B2Feb 18, 2025
Golf club having a damping element for ball speed control
ACUSHNET CO2 citations74
US12220623B2Feb 11, 2025
Golf club having a damping element for ball speed control
ACUSHNET CO3 citations74
US12083396B2Sep 10, 2024
Hollow co-molded iron with inner lightweight portion
ACUSHNET CO2 citations73
US11938387B2Mar 26, 2024
Golf club having a damping element for ball speed control
ACUSHNET CO2 citations73
US11511464B2Nov 29, 2022
Golf club head having multi-material face and method of manufacture
ACUSHNET CO1 citations73
US11498246B2Nov 15, 2022
Golf club head having multi-material face and method of manufacture
ACUSHNET CO3 citations73
US11433574B2Sep 6, 2022
Golf club head having multi-material face and method of manufacture
ACUSHNET CO3 citations73
US11351427B1Jun 7, 2022
Hollow co-molded iron with inner lightweight portion
ACUSHNET CO5 citations73
US10940371B2Mar 9, 2021
Multi-material golf club head
ACUSHNET CO2 citations73
US10806980B2Oct 20, 2020
Golf club with interchangeable sole
ACUSHNET CO2 citations73
US10507366B2Dec 17, 2019
Golf club having double-walled striking face
ACUSHNET CO4 citations73
US12472663B2Nov 18, 2025
Golf club head having a multi-material face and method of manufacture
ACUSHNET CO1 citations64
US12409585B2Sep 9, 2025
Golf club head having multi-material face and method of manufacture
ACUSHNET CO0 citations63
US11839797B2Dec 12, 2023
Multi-material golf club head
ACUSHNET CO1 citations63
US11794080B2Oct 24, 2023
Golf club having a damping element for ball speed control
ACUSHNET CO1 citations63
US12539452B2Feb 3, 2026
Golf club having a damping element for ball speed control
ACUSHNET CO0 citations62
US12102890B2Oct 1, 2024
Golf club having a low modulus crown
ACUSHNET CO0 citations62
US11986709B2May 21, 2024
Multi-material golf club head
ACUSHNET CO0 citations62
US11497971B2Nov 15, 2022
Golf club having a low modulus crown
ACUSHNET CO0 citations62
US10525314B2Jan 7, 2020
Golf club having removable weight
ACUSHNET CO0 citations52
US10850170B1Dec 1, 2020
Golf club head
ACUSHNET CO0 citations42
US10799776B1Oct 13, 2020
Polymer-filled hollow iron with thin back
ACUSHNET CO0 citations39