TEXAS DIGITAL SYSTEMS, INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F21V FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR 1109

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6341876 Illumination systemOct 21, 99Jan 29, 02[F21V]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6734837 Variable color display system for comparing exhibited value with limitExpiredJun 16, 99May 11, 04[G09G]
6690343 Display device with variable color background for evaluating displayed valueExpiredMar 20, 01Feb 10, 04[G09G]
6577287 Dual variable color display deviceExpiredFeb 20, 01Jun 10, 03[G09G]
6535186 Multicolor display elementExpiredMar 16, 98Mar 18, 03[G09G]
6424327 Multicolor display element with enable inputExpiredAug 11, 99Jul 23, 02[G09G]
6414662 Variable color complementary display device using anti-parallel light emitting diodesExpiredOct 12, 99Jul 02, 02[G09G]
2002/0000,956 DISPLAY DEVICE FOR EVALUATING DISPLAYED VALUEAbandonedJun 08, 98Jan 03, 02[G09G]
6310590 Method for continuously controlling color of display deviceExpiredAug 11, 99Oct 30, 01[G09G]
6300923 Continuously variable color optical deviceExpiredJul 06, 98Oct 09, 01[G09G]
6281864 Digital display system for variable color decimal point indicationExpiredMar 15, 99Aug 28, 01[G09G]
6239776 Multicolor multi-element display systemExpiredMay 05, 98May 29, 01[G09G]
6219014 Variable color display device having display area and background areaExpiredAug 18, 98Apr 17, 01[G09G]
6208322 Color control signal converterExpiredApr 23, 98Mar 27, 01[G09G]
6181126 Dual variable color measuring systemExpiredJun 17, 99Jan 30, 01[G09G, G01R]
6166710 Variable color display system for sequentially exhibiting digital valuesExpiredJun 18, 99Dec 26, 00[G09G]
6147483 Variable color digital voltmeter with analog comparatorExpiredJun 18, 99Nov 14, 00[G09G, G01R]
6133722 Variable color digital measuring and testing system with error memoryExpiredJun 16, 99Oct 17, 00[G09G, G01R]
6121767 Digital multimeter with variable color range indicationExpiredMar 24, 99Sep 19, 00[G09G, G01R]
6121944 Method of indicating and evaluating measured valueExpiredJun 08, 98Sep 19, 00[G09G]
6119073 Variable color digital measuring instrument for sequentially exhibiting measured valuesExpiredJun 17, 99Sep 12, 00[G01P]

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