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Inventor

John T. Armstrong, Jr.

Inventor
Chillicothe, IL, US

Overview

3→
Patents
1982–2002
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.

B60Wprimary
B60WConjoint control of vehicle sub-units of different type or different function17%
E21BEarth or rock drilling17%
F02DControlling combustion engines17%
F16HGearing17%
F16KValves17%
G01PMeasuring linear or angular speed, acceleration, deceleration, or shock17%
PatentTitleYear
6,454,015'Shearing gate valve'20024,523,892'Hydrostatic vehicle control'19854,331,917'Speed and direction sensing circuit'1982

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1982–1985Patents assigned to CATERPILLAR TRACTOR CO (2)· patent assignee history
1982–1985Based in Chillicothe, IL, US· patent location history
2002Patents assigned to VETCO GRAY INC ABB (1)· patent assignee history
2002Based in Banchory, GB· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
CATERPILLAR TRACTOR CO21982–1985
VETCO GRAY INC ABB12002
Locations
LocationPatentsSpan
Chillicothe, Illinois, US21982–1985
Banchory, GB12002