P

Inventor

HELKEY ROGER J

US11 patents
⚠️ This page may combine multiple inventors who share the name “HELKEY ROGER J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

CALIENT NETWORKS

4 patents
US7142744B2Nov 28, 2006

Wavelength power equalization by attenuation in an optical switch

CALIENT NETWORKS25 citations91
US6819815B1Nov 16, 2004

Method and apparatus for indirect adjustment of optical switch reflectors

CALIENT NETWORKS54 citations91
US6697547B2Feb 24, 2004

Wavelength power equalization by attenuation in an optical switch

CALIENT NETWORKS26 citations91
US6950215B2Sep 27, 2005

Method and apparatus for monitoring optical switches

CALIENT NETWORKS16 citations80

ASHTECH TELESIS INC

2 patents
US5134407AJul 28, 1992

Global positioning system receiver digital processing technique

ASHTECH TELESIS INC338 citations96
US4928106AMay 22, 1990

Global positioning system receiver with improved radio frequency and digital processing

ASHTECH TELESIS INC292 citations96

UNIV CALIFORNIA

2 patents
US5802084ASep 1, 1998

Generation of high power optical pulses using flared mode-locked semiconductor lasers and optical amplifiers

UNIV CALIFORNIA58 citations94
US5799024AAug 25, 1998

Generation of high power optical pulses using flared mode-locked semiconductor lasers and optical amplifiers

UNIV CALIFORNIA39 citations90

ASHTECH INC

1 patent
US5293170AMar 8, 1994

Global positioning system receiver digital processing technique

ASHTECH INC457 citations96

MASSACHUSETTS INST TECHNOLOGY

1 patent
US5955875ASep 21, 1999

Linearized optical sampler

MASSACHUSETTS INST TECHNOLOGY27 citations92

MASSACHUETTS INST OF TECHNOLOG

1 patent
US6028424AFeb 22, 2000

Linearized optical sampler

MASSACHUETTS INST OF TECHNOLOG19 citations90