John E. Callan

Person

Milwaukee, WI, US

People

Patents Grantslast 30 patents

Information Patent Grant
Programmable controller module rack with a relative rack slot addre...
- Patent number 5,038,317
- Issue date Aug 6, 1991
- Allen-Bradley Company, Inc.
- John E. Callan
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Optically coupled input circuit for digital control
- Patent number 4,507,571
- Issue date Mar 26, 1985
- Allen-Bradley Company
- John E. Callan
- G01 - MEASURING TESTING
Information Patent Grant
Programmable controller with expandable I/O interface circuitry
- Patent number 4,504,927
- Issue date Mar 12, 1985
- Allen-Bradley Company
- John E. Callan
- G05 - CONTROLLING REGULATING
Information Patent Grant
Switch network
- Patent number 4,435,706
- Issue date Mar 6, 1984
- Allen-Bradley Company
- John E. Callan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Latch relay drive circuit
- Patent number 4,418,374
- Issue date Nov 29, 1983
- Allen-Bradley Company
- John E. Callan
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Summing watt-hour transducer
- Patent number 4,288,744
- Issue date Sep 8, 1981
- Allen-Bradley Company
- John E. Callan
- G01 - MEASURING TESTING
Information Patent Grant
Digital watts transducer
- Patent number 4,079,313
- Issue date Mar 14, 1978
- Allen-Bradley Company
- John E. Callan
- G01 - MEASURING TESTING
Information Patent Grant
Solid state relay
- Patent number 4,039,855
- Issue date Aug 2, 1977
- Allen-Bradley Company
- John E. Callan
- H03 - BASIC ELECTRONIC CIRCUITRY

John E. Callan

Person

Patents Grantslast 30 patents

Programmable controller module rack with a relative rack slot addre...

Optically coupled input circuit for digital control

Programmable controller with expandable I/O interface circuitry

Switch network

Latch relay drive circuit

Summing watt-hour transducer

Digital watts transducer

Solid state relay