Inventor
HOPPERSTAD ERIK S
US14 patents
⚠️ This page may combine multiple inventors who share the name “HOPPERSTAD ERIK S”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
PRX PERFORMANCE LLC
12 patentsUS9993678B2Jun 12, 2018
Wall mounted exercise rack system
PRX PERFORMANCE LLC42 citations97
US9844691B2Dec 19, 2017
Wall mounted exercise rack system
PRX PERFORMANCE LLC43 citations97
US9649525B2May 16, 2017
Retractable wall mounted exercise rack system
PRX PERFORMANCE LLC43 citations97
US9498670B1Nov 22, 2016
Retractable wall mounted exercise rack system
PRX PERFORMANCE LLC66 citations97
US11446535B1Sep 20, 2022
Folding exercise rack system
PRX PERFORMANCE LLC28 citations92
US10632334B1Apr 28, 2020
Wall mounted exercise rack system
PRX PERFORMANCE LLC3 citations84
US10124201B2Nov 13, 2018
Wall mounted exercise rack system
PRX PERFORMANCE LLC2 citations73
US10107317B1Oct 23, 2018
Barbell collar system
PRX PERFORMANCE LLC6 citations73
US10039949B2Aug 7, 2018
Barbell collar system
PRX PERFORMANCE LLC3 citations73
US12102864B2Oct 1, 2024
Folding exercise rack system
PRX PERFORMANCE LLC0 citations61
US11766585B2Sep 26, 2023
Folding exercise rack system
PRX PERFORMANCE LLC1 citations61
US12214251B2Feb 4, 2025
Retractable exercise rack system
PRX PERFORMANCE LLC0 citations45