Inventor
HARFST MICHAEL D
US18 patents
⚠️ This page may combine multiple inventors who share the name “HARFST MICHAEL D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BLOUNT INC
12 patentsUS6748840B2Jun 15, 2004
Saw chain having drive link with guard feature
BLOUNT INC29 citations92
US4813323AMar 21, 1989
Chain link with folded over connecting portions
BLOUNT INC25 citations92
US5050303ASep 24, 1991
Chain saw bar fluid passage system
BLOUNT INC52 citations86
US9757808B2Sep 12, 2017
Formed wire tie strap with integrated rivet for a saw chain
BLOUNT INC9 citations83
US6446534B1Sep 10, 2002
Depth gauge for cutter
BLOUNT INC14 citations83
USD843802SMar 26, 2019
Bumper drive link
BLOUNT INC12 citations82
USD842910SMar 12, 2019
Cutter for saw chain
BLOUNT INC8 citations82
US9038519B2May 26, 2015
Apparatus, method, and system for orienting a saw chain link on a sprocket
BLOUNT INC8 citations82
US4873903AOct 17, 1989
Saw chain with wear link
BLOUNT INC10 citations73
US10406715B2Sep 10, 2019
Tie rivet for saw chain
BLOUNT INC5 citations72
USD839720SFeb 5, 2019
Tie strap
BLOUNT INC2 citations71
US10195759B2Feb 5, 2019
Tie strap with hardened integrated rivet for a saw chain
BLOUNT INC0 citations41
OREGON TOOL INC
5 patentsUS11247363B2Feb 15, 2022
Saw chain presets
OREGON TOOL INC2 citations71
US12365109B2Jul 22, 2025
Saw chain link with one or more oversized rivet holes
OREGON TOOL INC0 citations61
US11273573B2Mar 15, 2022
Saw chain link with one or more oversized rivet holes
OREGON TOOL INC1 citations61
US11090741B2Aug 17, 2021
High efficiency saw chain
OREGON TOOL INC1 citations59
US11926070B2Mar 12, 2024
Targeted oil delivery for chain saw bars
OREGON TOOL INC0 citations39