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Inventor

Bradford Johnstone

Inventor
Flossmoor, IL, US

Overview

8→
Patents
1987–2009
Patent span
Performing operations
Primary field (CPC B)

Patents· 8 as inventor

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

B61Fprimary
B61FRail vehicle suspensions, e.g. underframes, bogies or arrangements of wheel axles60%
B61DBody details or kinds of railway vehicles30%
B60PVehicles adapted for load transportation or to transport, to carry, or to comprise special loads or objects10%
PatentTitleYear
7,549,379'Railway freight car side bearing'20097,546,807'Constant contact side bearing'20097,527,003'Railroad freight car sidebearing'20095,109,776'Gondola type railway car with snug fitting center plate arrangement'19925,017,066'Well car adjustable guide apparatus'19914,782,762'Well car end girder arrangement'19884,741,274'Hopper door operating mechanism'19884,651,650'Axle stabilizer for railway truck'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987Patents assigned to PULLMAN STANDARD INC (1)· patent assignee history
1987–1992Based in Flossmoor, IL, US· patent location history
1988–1992Patents assigned to TRINITY IND INC (3)· patent assignee history
1988Patents assigned to TRINITY IND (1)· patent assignee history
2009Patents assigned to AMSTED RAIL CO INC (2)· patent assignee history
2009Patents assigned to ASF KEYSTONE INC (1)· patent assignee history
2009Based in Plainfield, IL, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
TRINITY IND INC31988–1992
AMSTED RAIL CO INC22009
ASF KEYSTONE INC12009
PULLMAN STANDARD INC11987
TRINITY IND11988
Locations
LocationPatentsSpan
Flossmoor, Illinois, US51987–1992
Plainfield, Illinois, US32009