Inventor
DANGROW JOSEPH C
US19 patents
⚠️ This page may combine multiple inventors who share the name “DANGROW JOSEPH C”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
WERNER CO
6 patentsUS7306075B2Dec 11, 2007
Dynamic hinge for ladder
WERNER CO24 citations91
USD584422SJan 6, 2009
Ladder leveler stile
WERNER CO10 citations81
US7234203B2Jun 26, 2007
Locking hinge for folding ladder
WERNER CO8 citations71
US12398597B2Aug 26, 2025
Ladder and ladder top
WERNER CO0 citations61
US12392197B2Aug 19, 2025
Ladder, top and method
WERNER CO0 citations60
US11933106B2Mar 19, 2024
Ladder, foot and method
WERNER CO1 citations60
DANGROW JOSEPH C
4 patentsUS8616336B2Dec 31, 2013
Method for a ladder with a ladder leveler
DANGROW JOSEPH C5 citations82
US8261882B2Sep 11, 2012
Ladder leveler and method
DANGROW JOSEPH C5 citations71
US8256573B2Sep 4, 2012
Ladder leveler and method
DANGROW JOSEPH C3 citations60
US10760337B2Sep 1, 2020
Ladder leveler and method
DANGROW JOSEPH C0 citations50
TIBER ROBERT C
3 patentsUS9435155B2Sep 6, 2016
Stepladder having a ladder top with conduit holder slot and method
TIBER ROBERT C16 citations87
US10458183B2Oct 29, 2019
Stepladder having a ladder top with conduit holder slot and method
TIBER ROBERT C12 citations79
US11536087B2Dec 27, 2022
Stepladder having a ladder top with conduit holder slot and method
TIBER ROBERT C0 citations57