DH

Douglas D. Hamilton

LD Logging Development: 6 patents #1 of 3Top 35%
CL Canadian Patents And Development Limited: 1 patents #88 of 449Top 20%
ES Elevator Safety: 1 patents #5 of 9Top 60%
📍 Montréal, CA: #381 of 4,862 inventorsTop 8%
Overall (All Time): #499,796 of 4,157,543Top 15%
10
Patents All Time

Issued Patents All Time

Showing 1–10 of 10 patents

Patent #TitleCo-InventorsDate
11407615 Elevator guide Andrew James Laughton, Jeffrey Lachica Geroso, Tyler Stine, Antonio Alexander Witt 2022-08-09
5377730 Apparatus to stabilize a cut tree in the vertical position during movement by a feller-buncher 1995-01-03
5161588 Tree felling head with combination tree accumulator and tree abutment 1992-11-10
5129438 Boom mounted type tree processing head and mounting therefore 1992-07-14
5044409 Force matching tree shear 1991-09-03
5026248 Hydrodynamic swing damper and tree handling vehicle incorporating the same 1991-06-25
5004026 Felling head Charles D. MacLennan, Robert M. Palfy 1991-04-02
4717081 Tree residue processor 1988-01-05
4690185 Rim driven rotary cutter and tree felling head incorporating the same Robert M. Palfy, Hans Viereck 1987-09-01
4593733 Tree felling head having a rim driven rotary cutter 1986-06-10