Inventor · disambiguated record
Douglas D. Hamilton
Also filed as: HAMILTON DOUGLAS D · HAMILTON III DOUGLAS
12 granted patents·249 citations·filing 1974–2020
92Inventor score
Files withLOGGING DEV CORP8CANADIAN PATENTS DEV1Elevator Safety Company1HAMILTON DOUGLAS D1MACLENNAN CHARLES1
Top patents by PatentIndex Score
12 records- 0192US5026248AHydrodynamic swing damper and tree handling vehicle incorporating the sameLOGGING DEV CORP·Filed 1989·Granted Jun 25, 1991·54 cites·21 claims
- 0279US5129438ABoom mounted type tree processing head and mounting thereforeLOGGING DEV CORP·Filed 1990·Granted Jul 14, 1992·39 cites·11 claims
- 0367US5377730AApparatus to stabilize a cut tree in the vertical position during movement by a feller-buncherLOGGING DEV CORP·Filed 1992·Granted Jan 3, 1995·25 cites·6 claims
- 0467US5004026AFelling headMACLENNAN CHARLES·Filed 1989·Granted Apr 2, 1991·28 cites·6 claims
- 0566US4593733ATree felling head having a rim driven rotary cutterLOGGING DEV CORP·Filed 1984·Granted Jun 10, 1986·15 cites·18 claims
- 0663US5161588ATree felling head with combination tree accumulator and tree abutmentLOGGING DEV CORP·Filed 1991·Granted Nov 10, 1992·24 cites·6 claims
- 0752US4717081ATree residue processorCANADIAN PATENTS DEV·Filed 1984·Granted Jan 5, 1988·11 cites·2 claims
- 0852US4690185ARim driven rotary cutter and tree felling head incorporating the sameLOGGING DEV CORP·Filed 1986·Granted Sep 1, 1987·17 cites·40 claims
- 0951US5044409AForce matching tree shearHAMILTON DOUGLAS D·Filed 1990·Granted Sep 3, 1991·17 cites·8 claims
- 1048US3970124AMethod and apparatus for severing and marking treesLOGGING DEV CORP·Filed 1975·Granted Jul 20, 1976·10 cites·10 claims
- 1147US11407615B2Elevator guideElevator Safety Company·Filed 2020·Granted Aug 9, 2022·0 cites·19 claims
- 1246US4004622AHarvester processor assemblyLOGGING DEV CORP·Filed 1974·Granted Jan 25, 1977·9 cites·9 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →