Inventor
Michael D. Harfst
Inventor
Milwaukie, OR, US
Overview
Patents· 14 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B27Bprimary
B27BSaws for wood or similar material32%
Y10TTechnical subjects covered by former us classification21%
B23DPlaning15%
B21LMaking metal chains6%
F16GBelts, cables, or ropes, predominantly used for driving purposes6%
C21DModifying the physical structure of ferrous metals3%
C23CCoating metallic material3%
F16BDevices for fastening or securing constructional elements or machine parts together, e.g. nails, bolts, circlips, clamps, clips or wedges3%
LOC083%
LOC093%
PatentTitleYear
11,090,741High efficiency saw chain202110,406,715Tie rivet for saw chain2019D0843802Bumper drive link2019D0842910Cutter for saw chain201910,195,759Tie strap with hardened integrated rivet for a saw chain2019D0839720Tie strap20199,757,808'Formed wire tie strap with integrated rivet for a saw chain'20179,038,519'Apparatus, method, and system for orienting a saw chain link on a sprocket'20156,748,840'Saw chain having drive link with guard feature'20046,446,534'Depth gauge for cutter'20026,058,825'Depth gauge for cutter'20005,050,303'Chain saw bar fluid passage system'19914,873,903'Saw chain with wear link'19894,813,323'Chain link with folded over connecting portions'1989Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1989–2019Patents assigned to BLOUNT INC (12)· patent assignee history
1989–2021Based in Milwaukie, OR, US· patent location history
2000Patents assigned to BLOUT INC (1)· patent assignee history
2021Patents assigned to OREGON TOOL INC (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BLOUNT INC | 12 | 1989–2019 |
| BLOUT INC | 1 | 2000 |
| OREGON TOOL INC | 1 | 2021 |
Locations
| Location | Patents | Span |
|---|---|---|
| Milwaukie, OR, US | 14 | 1989–2021 |