DW

David E. Welsh

IT Itt: 12 patents #6 of 721Top 1%
CN Calient Networks: 7 patents #5 of 48Top 15%
DL Dana Limited: 2 patents #266 of 1,099Top 25%
CT Calient Technologies: 1 patents #12 of 24Top 50%
IE Itt Manufacturing Enterprises: 1 patents #577 of 1,404Top 45%
Overall (All Time): #185,360 of 4,157,543Top 5%
23
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
8639069 Wavelength dependent optical switch Roger Helkey, John E. Bowers, Xuezhe Zheng, Robert Anderson, Olivier Jerphagnon 2014-01-28
6950215 Method and apparatus for monitoring optical switches Walt Joseph Fant, Roger Helkey, Tony Walter, Peter Hunt 2005-09-27
6819824 Optical switch package James R. Sechrist, John E. Bowers, Adrian John Keating, Xuezhe Zheng, David Henry Kinghorn +3 more 2004-11-16
6819815 Method and apparatus for indirect adjustment of optical switch reflectors Charles M. Corbalis, John E. Bowers, Shifu Yuan, Roger Helkey 2004-11-16
6792177 Optical switch with internal monitoring Roger Helkey, Adrian John Keating, Daniel J. Blumenthal, Walter Fant 2004-09-14
6681473 Method and apparatus for hermetically sealing fiber array blocks Bin Liu, R. Kehl Sink, Yuanjian Xu 2004-01-27
6668108 Optical cross-connect switch with integrated optical signal tap Roger Helkey, John E. Bowers, Tony Walter, Kevin S. Yamada 2003-12-23
6643425 Optical switch having switch mirror arrays controlled by scanning beams John E. Bowers, Chandrasekhar Pusarla, Kevin White, Dan Blumenthal, Roger Helkey +1 more 2003-11-04
6032551 Balance weight and method of securing same to a rotatable tubular body Oliver Lee Sims 2000-03-07
5898807 Optic fiber connector 1999-04-27
5778737 Balance weight and method of securing same to a rotatable tubular body Oliver Lee Sims 1998-07-14
5411418 Repairable solderless connector arrangement Peter Joseph Hyzin 1995-05-02
5373573 High density fiber optic connector 1994-12-13
5181863 EMI shielding backshell system 1993-01-26
5090911 Modular connector system 1992-02-25
5088942 Closed entry socket contact assembly David Rofer 1992-02-18
5066250 Polarizing key permitting connector displacement 1991-11-19
5046964 Hybrid connector Piyapote Pisalyaput, William C. Gore 1991-09-10
5015192 Contact retention and sealing system Albert H. Wilson 1991-05-14
4941847 Electrical connector contact retention system 1990-07-17
4935847 Circuit system with jackscrew installation device 1990-06-19
4812137 Connector with EMI/RFI grounding spring Albert H. Wilson 1989-03-14
4808118 Retention and ground plane connector clip Albert H. Wilson 1989-02-28