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Inventor

John W. Purdy

Inventor
Dartmouth, CA

Overview

2→
Patents
1980–1991
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 2 as inventor

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

F01Nprimary
F01NGas-flow silencers or exhaust apparatus for machines or engines in general20%
F16LPipes20%
G02BOptical elements, systems or apparatus20%
H04BTransmission20%
Y02TClimate change mitigation technologies related to transportation20%
PatentTitleYear
5,039,193'Fibre optic single mode rotary joint'19914,190,269'Adapter for exhaust actuated devices'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980Patents assigned to WESGAR IND LTD (1)· patent assignee history
1980Based in Vancouver, CA· patent location history
1991Patents assigned to FOCAL TECHN INC (1)· patent assignee history
1991Based in Dartmouth, CA· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
FOCAL TECHN INC11991
WESGAR IND LTD11980
Locations
LocationPatentsSpan
Dartmouth, CA11991
Vancouver, CA11980