Inventor
Patrick J. Douglas
Inventor
Castletown, GB
Overview
Patents· 24 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B07Bprimary
B07BSeparating solids from solids by sieving, screening, sifting or by using gas currents28%
B65GTransport or storage devices, e.g. conveyors for loading or tipping, shop conveyor systems or pneumatic tube conveyors13%
E01CConstruction of, or surfaces for, roads, sports grounds, or the like13%
B02CCrushing, pulverising, or disintegrating in general9%
B60PVehicles adapted for load transportation or to transport, to carry, or to comprise special loads or objects6%
A01KAnimal husbandry3%
B62DMotor vehicles3%
B63HMarine propulsion or steering3%
E02FDredging3%
E06CLadders3%
PatentTitleYear
10,895,159Removable anti-wear part for blade tip20217,422,116'Self-propelled screening apparatus'20087,407,419'Outboard engine mounting assembly'20086,606,965'Stackable pet shelter'20036,405,874'Mobile material handling apparatus with lowerable track set'20026,336,558'Tractor unit and wheeled trailer combination'20026,311,821'Material processing plant'20016,186,338'Self-propelled material-processing apparatus'20016,098,812'Mobile screening apparatus and method'2000D0416321'Portable electrical fan'19995,979,666'Apparatus for screening particulate material'19995,957,302'Mobile screening apparatus'19995,605,205'Readily deployable portable escape ladder'1997D0371854'Ladder rung'1996D0370736'Escape ladder'1996D0357762'Decorative housing for wall mounted electrical unit'19955,333,725'Foldable framework for belt conveyor'19945,328,036'Vibratory screening apparatus'19945,112,474'Screening apparatus with tiltable vibratory screen'19925,086,911'Foldable framework for belt conveyors'19925,044,484'Endless conveyor elevator with foldable support frame'1991D0298612'Dumper truck with jib attachment'19884,058,198'Conveyor assembly'1977D0244925'Screening apparatus for quarrying'1977Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1977Patents assigned to POWERSCREEN INT LTD (2)· patent assignee history
1977Based in Dungannon, EI· patent location history
1988–1994Patents assigned to DOUGLAS PATRICK J (4)· patent assignee history
1991–2008Patents assigned to EXTEC SCREENS & CRUSHERS LTD (3)· patent assignee history
1991–1992Based in Santon, GB· patent location history
1994–1999Based in Isle of Man, GB· patent location history
1995–1997Based in Chicago, IL, US· patent location history
1996–1997Patents assigned to BRK BRANDS INC (3)· patent assignee history
1999–2008Based in Castletown, GB· patent location history
2008Patents assigned to DOUGLAS PATRICK (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| DOUGLAS PATRICK Jself | 4 | 1988–1994 |
| BRK BRANDS INC | 3 | 1996–1997 |
| EXTEC SCREENS & CRUSHERS LTD | 3 | 1991–2008 |
| POWERSCREEN INT LTD | 2 | 1977 |
| DOUGLAS PATRICKself | 1 | 2008 |
Locations
| Location | Patents | Span |
|---|---|---|
| Castletown, GB | 7 | 1999–2008 |
| Chicago, Illinois, US | 4 | 1995–1997 |
| Isle of Man, GB | 2 | 1994–1999 |
| Santon, GB | 2 | 1991–1992 |
| Dungannon, EI | 2 | 1977 |