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Inventor

John Rutledge

Inventor
Peterborough, GB

Overview

3→
Patents
1991–2021
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 3 as inventor

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

E21Bprimary
E21BEarth or rock drilling8%
F01BMachines or engines, in general or of positive-displacement type, e.g. steam engines8%
F01NGas-flow silencers or exhaust apparatus for machines or engines in general8%
F01PCooling of machines or engines in general8%
F02BInternal-combustion piston engines8%
F02DControlling combustion engines8%
F02GHot gas or combustion-product positive-displacement engine plants8%
F02NStarting of combustion engines8%
G01VGeophysics8%
H02KDynamo-electric machines8%
PatentTitleYear
10,934,949Combined engine systems20219,735,723'Method to control a switched reluctance motor'20175,036,496'Method for cement evaluation using acoustical logs'1991

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1991Patents assigned to CHEVRON RES & TECH (1)· patent assignee history
1991Based in Jersey Village, TX, US· patent location history
2017Patents assigned to PERKINS ENGINES CO LTD (1)· patent assignee history
2017–2021Based in Peterborough, GB· patent location history
2021Patents assigned to CATERPILLAR INC (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
CATERPILLAR INC12021
CHEVRON RES & TECH11991
PERKINS ENGINES CO LTD12017
Locations
LocationPatentsSpan
Peterborough, GB22017–2021
Jersey Village, Texas, US11991