US5172291A
1990-03-27
Intelligent power controller
US4217658A
1977-07-25
Process control system that controls its outputs according to the results of successive analysis of the vertical input columns of a hypothetical ladder diagram
US3881172A
1973-03-30
Process control computer
US3764857A
1972-05-31
Cabinet for interchangeable circuit boards
CA970455A
1972-03-20
Process control system
US3761882A
1971-12-01
Process control computer
US3660692A
1970-11-09
Electronic interval timer
US3651477A
1970-06-18
Process control system
US3626203A
1970-06-11
Mechanical switch interface
US3613029A
1970-06-08
Crystal-controlled cross-coupled nand gate square-wave generator
US3626207A
1970-06-05
Solid-state power switch
US3626248A
1970-02-06
Contact monitoring system
US3663950A
1970-01-19
Quad ac power switch with synch
US3324434A
1965-07-29
Electromagnetic relay with magnetic plastic hinge pad
US3206538A
1962-06-14
Hermetic seal header with offset skirt-casing weld
US3106625A
1961-02-21
Latch-in relay devices
US2460358A
1947-01-04
Self-starting synchronous hysteresis motor
US2488928A
1946-02-04
Electromagnetically operated switch
US2264841A
1940-06-24
Electric switch
US2096709A
1936-03-10
Control switch
