For the Inventor, By the Inventor

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Ithaca, NY, United States of America

Borg-Warner Transmission and Engine Components Corporation

USPTO Granted Patents = 3

Forward Citations = 55

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4 inventors (with patents filed for the assignee):

Franklin R Smith (2 out of 47 patents)

Roger P Butterfield (1 out of 31 patents)

Peter D Hoffmann (1 out of 1 patent)

4. David M Groh (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 4869708 - Sprocket retention/chain guide assembly (1989-09-26),

2. 4862845 - Variable camshaft timing system (1989-09-05),

3. 4821857 - Stamped roller clutch cage with integral snap ring (1989-04-18),

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USPTO Data Jan 1 1976 - Jan 6 2026

3 Patents

#43 in Ithaca, NY

#4,338 in New York

#72,066 in US

Ithaca, NY, United States of America

Borg-Warner Transmission and Engine Components Corporation

Forward Citations = 55

4 inventors:

Franklin R Smith (2 out of 47 patents)

Roger P Butterfield (1 out of 31 patents)

Peter D Hoffmann (1 out of 1 patent)

4. David M Groh (1 out of 1 patent)

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