Karel Havel

Person

Bramalea, CA

People

Patents Grantslast 30 patents

Information Patent Grant
Variable color display system for comparing exhibited value with limit
- Patent number 6,734,837
- Issue date May 11, 2004
- Texas Digital Systems, Inc.
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Display device with variable color background for evaluating displa...
- Patent number 6,690,343
- Issue date Feb 10, 2004
- Texas Digital Systems, Inc.
- Karel Havel
- G08 - SIGNALLING
Information Patent Grant
Dual variable color display device
- Patent number 6,577,287
- Issue date Jun 10, 2003
- Texas Digital Systems, Inc.
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Multicolor display element
- Patent number 6,535,186
- Issue date Mar 18, 2003
- Texas Digital Systems, Inc.
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Multicolor display element with enable input
- Patent number 6,424,327
- Issue date Jul 23, 2002
- Texas Digital Systems, Inc.
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Variable color complementary display device using anti-parallel lig...
- Patent number 6,414,662
- Issue date Jul 2, 2002
- Texas Digital Systems, Inc.
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Method for continuously controlling color of display device
- Patent number 6,310,590
- Issue date Oct 30, 2001
- Texas Digital Systems, Inc.
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Continuously variable color optical device
- Patent number 6,300,923
- Issue date Oct 9, 2001
- Texas Digital Systems, Inc.
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Digital display system for variable color decimal point indication
- Patent number 6,281,864
- Issue date Aug 28, 2001
- Texas Digital Systems, Inc.
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Multicolor multi-element display system
- Patent number 6,239,776
- Issue date May 29, 2001
- Texas Digital Systems, Inc.
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Variable color display device having display area and background area
- Patent number 6,219,014
- Issue date Apr 17, 2001
- Texas Digital Systems, Inc.
- Karel Havel
- G08 - SIGNALLING
Information Patent Grant
Color control signal converter
- Patent number 6,208,322
- Issue date Mar 27, 2001
- Texas Digital Systems, Inc.
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Dual variable color measuring system
- Patent number 6,181,126
- Issue date Jan 30, 2001
- Texas Digital Systems, Inc.
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Variable color display system for sequentially exhibiting digital v...
- Patent number 6,166,710
- Issue date Dec 26, 2000
- Texas Digital Systems, Inc.
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Variable color digital voltmeter with analog comparator
- Patent number 6,147,483
- Issue date Nov 14, 2000
- Texas Digital Systems, Inc.
- Karel Havel
- G08 - SIGNALLING
Information Patent Grant
Variable color digital measuring and testing system with error memory
- Patent number 6,133,722
- Issue date Oct 17, 2000
- Texas Digital Systems, Inc.
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Digital multimeter with variable color range indication
- Patent number 6,121,767
- Issue date Sep 19, 2000
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Method of indicating and evaluating measured value
- Patent number 6,121,944
- Issue date Sep 19, 2000
- Texas Digital Systems, Inc.
- Karel Havel
- G08 - SIGNALLING
Information Patent Grant
Variable color digital measuring instrument for sequentially exhibi...
- Patent number 6,119,073
- Issue date Sep 12, 2000
- Texas Digital Systems, Inc.
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Variable color display system
- Patent number 6,018,237
- Issue date Jan 25, 2000
- Texas Digital Systems, Inc.
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Display device with variable color background area
- Patent number 5,963,185
- Issue date Oct 5, 1999
- Texas Digital Systems, Inc.
- Karel Havel
- G08 - SIGNALLING
Information Patent Grant
Variable color display system
- Patent number 5,656,935
- Issue date Aug 12, 1997
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Digital color display system
- Patent number 5,561,365
- Issue date Oct 1, 1996
- Karel Havel
- G08 - SIGNALLING
Information Patent Grant
Variable color digital multimeter
- Patent number 5,475,300
- Issue date Dec 12, 1995
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Variable color digital multimeter
- Patent number 5,283,517
- Issue date Feb 1, 1994
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Multicolor logic device
- Patent number 5,194,854
- Issue date Mar 16, 1993
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Variable color digital multimeter
- Patent number 5,122,733
- Issue date Jun 16, 1992
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Measuring device with variable color display
- Patent number 5,057,768
- Issue date Oct 15, 1991
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Measuring device with variable color background
- Patent number 5,003,247
- Issue date Mar 26, 1991
- Karel Havel
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Continuously variable color optical device
- Patent number 4,965,561
- Issue date Oct 23, 1990
- Karel Havel
- G04 - HOROLOGY

Patents Applicationslast 30 patents

Information Patent Application
Dual variable color display device
- Publication number 20020003511
- Publication date Jan 10, 2002
- Karel Havel
- G01 - MEASURING TESTING
Information Patent Application
MULTICOLOR DISPLAY ELEMENT WITH ENABLE INPUT
- Publication number 20020000957
- Publication date Jan 3, 2002
- Karel Havel
- G01 - MEASURING TESTING
Information Patent Application
DISPLAY DEVICE FOR EVALUATING DISPLAYED VALUE
- Publication number 20020000956
- Publication date Jan 3, 2002
- Karel Havel
- G01 - MEASURING TESTING
Information Patent Application
Display device with variable color background for evaluating displa...
- Publication number 20010015708
- Publication date Aug 23, 2001
- Karel Havel
- G01 - MEASURING TESTING

Karel Havel

Person

Patents Grantslast 30 patents

Variable color display system for comparing exhibited value with limit

Display device with variable color background for evaluating displa...

Dual variable color display device

Multicolor display element

Multicolor display element with enable input

Variable color complementary display device using anti-parallel lig...

Method for continuously controlling color of display device

Continuously variable color optical device

Digital display system for variable color decimal point indication

Multicolor multi-element display system

Variable color display device having display area and background area

Color control signal converter

Dual variable color measuring system

Variable color display system for sequentially exhibiting digital v...

Variable color digital voltmeter with analog comparator

Variable color digital measuring and testing system with error memory

Digital multimeter with variable color range indication

Method of indicating and evaluating measured value

Variable color digital measuring instrument for sequentially exhibi...

Variable color display system

Display device with variable color background area

Variable color display system

Digital color display system

Variable color digital multimeter

Variable color digital multimeter

Multicolor logic device

Variable color digital multimeter

Measuring device with variable color display

Measuring device with variable color background

Continuously variable color optical device

Patents Applicationslast 30 patents

Dual variable color display device

MULTICOLOR DISPLAY ELEMENT WITH ENABLE INPUT

DISPLAY DEVICE FOR EVALUATING DISPLAYED VALUE

Display device with variable color background for evaluating displa...