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Inventor

Donald Stewart

Inventor
London, GB

Overview

12→
Patents
1979–2019
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 12 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G06Fprimary
G06FElectric digital data processing15%
H04LTransmission of digital information, e.g. telegraphic communication15%
E02BHydraulic engineering8%
F03BMachines or engines for liquids8%
F05BIndexing scheme relating to wind, spring, weight, inertia or like motors, to machines or engines for liquids covered by subclasses f03b, f03d and f03g8%
F23BMethods or apparatus for combustion using only solid fuel8%
F23GCremation furnaces8%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution8%
B64DEquipment for fitting in or to aircraft4%
E02FDredging4%
PatentTitleYear
10,419,373Method and apparatus for composite user interface generation20199,654,429'Method and apparatus for composite user interface generation'20179,389,927'Method and apparatus for composite user interface generation'20168,522,460'Underwater excavation apparatus'20138,407,718'Method and apparatus for composite user interface generation'20137,944,073'Power generator and turbine unit'20117,768,145'Power generator and turbine unit'20106,854,953'Speed governor'20054,426,049'Dual propeller and engine drive system for aircraft'19844,222,280'Speed changing unit construction'19804,210,995'Method of constructing a burner'19804,132,179'Burning apparatus'1979

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1979–1984Patents assigned to STEWART DONALD M (4)· patent assignee history
1979–1980Patents assigned to HEIMBURG RICHARD W (2)· patent assignee history
1979–1980Based in Syracuse, NY, US· patent location history
1980–1984Based in Salem, OH, US· patent location history
2005–2013Patents assigned to ROTECH HOLDINGS LTD (4)· patent assignee history
2005–2013Based in Munlochy, GB· patent location history
2010–2011Based in Ross-shire, GB· patent location history
2013Patents assigned to CORIZON LTD (1)· patent assignee history
2013–2019Based in London, GB· patent location history
2016–2019Patents assigned to VERSATA FZ LLC (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
ROTECH HOLDINGS LTD42005–2013
STEWART DONALD Mself41979–1984
HEIMBURG RICHARD W21979–1980
VERSATA FZ LLC22016–2019
CORIZON LTD12013
Locations
LocationPatentsSpan
London, GB42013–2019
Munlochy, GB22005–2013
Ross-shire, GB22010–2011
Salem, OH, US21980–1984
Syracuse, New York, US21979–1980