Inventor
SIMPSON DENNIS D
US22 patents
⚠️ This page may combine multiple inventors who share the name “SIMPSON DENNIS D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TRICAM INDUSTRIES INC
21 patentsUSD855833SAug 6, 2019
Ladder rail
TRICAM INDUSTRIES INC18 citations94
US10138680B2Nov 27, 2018
Hinged tray for ladder or step stool
TRICAM INDUSTRIES INC43 citations94
USD826507SAug 21, 2018
Log cart
TRICAM INDUSTRIES INC20 citations94
US9752334B2Sep 5, 2017
Foldable work platform device
TRICAM INDUSTRIES INC31 citations94
US10648234B2May 12, 2020
Step ladder
TRICAM INDUSTRIES INC26 citations92
USD840055SFeb 5, 2019
Step ladder
TRICAM INDUSTRIES INC31 citations92
USD710031SJul 29, 2014
Step stool
TRICAM INDUSTRIES INC29 citations91
US11391089B2Jul 19, 2022
Stepladder folding leg
TRICAM INDUSTRIES INC7 citations86
US11299187B2Apr 12, 2022
Dump cart
TRICAM INDUSTRIES INC11 citations86
USD897679SOct 6, 2020
Cart tub
TRICAM INDUSTRIES INC11 citations86
USD897680SOct 6, 2020
Cart tub
TRICAM INDUSTRIES INC9 citations84
USD876744SFeb 25, 2020
Dumping cart
TRICAM INDUSTRIES INC10 citations84
USD860476SSep 17, 2019
Hinge for a multi-position ladder
TRICAM INDUSTRIES INC6 citations84
USD819917SJun 5, 2018
Cart
TRICAM INDUSTRIES INC10 citations84
US9869125B2Jan 16, 2018
Latch for ladder or step stool
TRICAM INDUSTRIES INC11 citations82
USD687614SAug 6, 2013
Cart
TRICAM INDUSTRIES INC6 citations82
US11505994B2Nov 22, 2022
Top cap for multi-position ladder
TRICAM INDUSTRIES INC6 citations75
US11220862B2Jan 11, 2022
Step ladder
TRICAM INDUSTRIES INC3 citations71
US12583498B2Mar 24, 2026
Dump cart
TRICAM INDUSTRIES INC0 citations62
US12084917B2Sep 10, 2024
Stepladder tray
TRICAM INDUSTRIES INC1 citations62
US11629514B2Apr 18, 2023
Work platform
TRICAM INDUSTRIES INC1 citations62