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Inventor

David T. Fenzel

Inventor
Grafton, OH, US

Overview

4→
Patents
1985–2011
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 4 as inventor

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

F16Dprimary
F16DCouplings for transmitting rotation43%
F01PCooling of machines or engines in general29%
B60TVehicle brake control systems or parts thereof14%
Y10TTechnical subjects covered by former us classification14%
PatentTitleYear
7,975,715'Trailer spring brake valve'20115,215,175'Clutch drive mechanism'19934,830,161'Fan clutch'19894,541,516'Clutch drive with antirotation spring'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1985Patents assigned to ALLIED CORP (1)· patent assignee history
1985–2011Based in Grafton, OH, US· patent location history
1989–1993Patents assigned to ALLIED SIGNAL INC (2)· patent assignee history
2011Patents assigned to BENDIX COMMERCIAL VEHICLE SYS (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
ALLIED SIGNAL INC21989–1993
ALLIED CORP11985
BENDIX COMMERCIAL VEHICLE SYS12011
Locations
LocationPatentsSpan
Grafton, OH, US41985–2011