Inventor
TSAI JOHN C
US37 patents
⚠️ This page may combine multiple inventors who share the name “TSAI JOHN C”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FIBERA INC
15 patentsUS6748138B2Jun 8, 2004
Optical grating fabrication
FIBERA INC140 citations98
US6904200B2Jun 7, 2005
Multidimensional optical gratings
FIBERA INC21 citations92
US7139295B2Nov 21, 2006
Tunable wavelength locker, tunable wavelength spectrum monitor, and relative wavelength measurement system
FIBERA INC18 citations84
US7027136B2Apr 11, 2006
Structure analysis and defect detection system
FIBERA INC9 citations74
US7004038B2Feb 28, 2006
Fiber optic flow meter
FIBERA INC7 citations74
US6804060B1Oct 12, 2004
Interference filter fabrication
FIBERA INC12 citations74
US6795459B2Sep 21, 2004
Light frequency locker
FIBERA INC10 citations74
US6731659B1May 4, 2004
Frequency locker
FIBERA INC6 citations74
US7268699B2Sep 11, 2007
Highway-rail grade crossing hazard mitigation
FIBERA INC3 citations63
US7245217B2Jul 17, 2007
Hazard mitigation for railway track intrusions at train station platforms
FIBERA INC4 citations63
US6858834B2Feb 22, 2005
Light wavelength meter
FIBERA INC3 citations63
US6812452B2Nov 2, 2004
Apparatus and method for measuring the wavelength of light present in a light beam
FIBERA INC4 citations63
US6807339B1Oct 19, 2004
Wavelength division multiplexing and de-multiplexing system
FIBERA INC4 citations63
US6718092B2Apr 6, 2004
Frequency detection, tuning and stabilization system
FIBERA INC3 citations63
US7116846B2Oct 3, 2006
Athermal fiber Bragg grating
FIBERA INC2 citations54
EXCEL PREC CORP
7 patentsUS7224467B2May 29, 2007
System for rotation measurement with laser interferometry
EXCEL PREC CORP7 citations73
US7196798B2Mar 27, 2007
Optical alignment method and apparatus
EXCEL PREC CORP7 citations73
US6522604B2Feb 18, 2003
Apparatus and method for inscribing, optically detecting, and using a clock pattern to write a servo pattern in an information storage unit
EXCEL PREC CORP5 citations73
US6316779B1Nov 13, 2001
Rotation and translation measurement with phase sensitive detection
EXCEL PREC CORP10 citations73
US6266298B1Jul 24, 2001
Apparatus and method for inscribing, optically detecting, and using a clock pattern to write a servo pattern in an information storage unit
EXCEL PREC CORP12 citations73
US7375822B2May 20, 2008
Rotation and translation measurement
EXCEL PREC CORP3 citations62
US6317200B1Nov 13, 2001
Positional measurement with normalized signal processing
EXCEL PREC CORP5 citations60
EXCEL PRECISION INC
6 patentsUS6052186AApr 18, 2000
Dual laser system for extended heterodyne interferometry
EXCEL PRECISION INC68 citations96
US5774295AJun 30, 1998
Servo track writing technique
EXCEL PRECISION INC21 citations92
US5394244AFeb 28, 1995
Ambient air refracture index measuring device
EXCEL PRECISION INC33 citations92
US5315372AMay 24, 1994
Non-contact servo track writing apparatus having read/head arm and reference arm
EXCEL PRECISION INC41 citations92
US5920392AJul 6, 1999
Environmental parameter measurement device and method for laser interferometry
EXCEL PRECISION INC24 citations86
US5995526ANov 30, 1999
Transverse Zeeman laser
EXCEL PRECISION INC5 citations54