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Inventor

Douglas D. Carden

Inventor
Barneveld, WI, US

Overview

5→
Patents
1980–1990
Patent span
Human necessities
Primary field (CPC A)

Patents· 5 as inventor

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

A61Mprimary
A61MDevices for introducing media into, or onto, the body31%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests15%
Y10TTechnical subjects covered by former us classification15%
A61GTransport, personal conveyances, or accommodation specially adapted for patients or disabled persons8%
F16KValves8%
F16LPipes8%
G05DSystems for controlling or regulating non-electric variables8%
H05BElectric heating8%
PatentTitleYear
4,915,132'Gas regulator selector valve'19904,903,726'Medical vacuum regulating cartridge'19904,844,409'Medical gas adapter with molded spring bias'19894,334,629'Counterbalance mechanism for incubator hood'19824,201,737'Nebulizing apparatus'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980–1982Patents assigned to AIRCO INC (2)· patent assignee history
1980–1990Based in Barneveld, WI, US· patent location history
1989–1990Patents assigned to BOC GROUP INC (2)· patent assignee history
1990Patents assigned to AEROS INSTR INC (1)· patent assignee history
1990Patents assigned to BOC GROUP INC OHMEDA DIVISION (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
AIRCO INC21980–1982
BOC GROUP INC21989–1990
AEROS INSTR INC11990
BOC GROUP INC OHMEDA DIVISION11990
Locations
LocationPatentsSpan
Barneveld, WI, US51980–1990