DV

David T. Vierk

BO Borgwarner: 7 patents #139 of 1,600Top 9%
BA Borg-Warner Automotive: 4 patents #31 of 259Top 15%
Overall (All Time): #445,546 of 4,157,543Top 15%
11
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
12146533 Clutch assembly and rotating system including the same Benjamin A. Siegel, Steven John Kowal 2024-11-19
11746847 Clutch system and vehicle transmission system including the same Benjamin A. Siegel, Steven John Kowal, Richard W. Pridgen, Jr. 2023-09-05
11092200 Friction plate and clutch assembly including the same Benjamin A. Siegel, Paul H. Elsesser, Richard W. Pridgen, Jr. 2021-08-17
10378631 Friction clutch having a first friction material engageable in a partially engaged position and a second friction material engageable in a fully engaged position Benjamin A. Siegel 2019-08-13
10060485 Composite friction and dog clutch Steven John Kowal 2018-08-28
9771984 Dual gain friction clutch Steven John Kowal 2017-09-26
8905212 Synchro-lock clutch-combination friction and mechanical locking clutch James G. Marciniak, Steven John Kowal, James R. Papania 2014-12-09
5680921 Transmission band assembly Anthony J. Grzesiak 1997-10-28
5499700 Double wrap brake band with break-away ties Darrel D. Richardson, Anthony J. Grzesiak 1996-03-19
5476160 Double-wrap brake band assembly Robert J. Fenoglio, Steven P. Geary, Christopher P. Puchalla, Anthony J. Grzesiak, Allen C. Mayhew 1995-12-19
4986397 Lock-up piston plate for recirculating flow torque converter 1991-01-22