Inventor

HOFFMAN JOHN P

US28 patents

⚠️ This page may combine multiple inventors who share the name “HOFFMAN JOHN P”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HOFFMAN JOHN P

CATERPILLAR INC

Computerized diagnostic and monitoring system

Method and apparatus for displaying sensor outputs in a diagnostic system

Vehicle computer monitoring system screen and display

Dual current sensing driver circuit

Dual current sensing driver circuit

Method and apparatus for indicating a changed condition

Reverse voltage protection circuit

Computerized monitoring system having a programmable gauge

Method and apparatus for modifying the functionality of a gauge

Apparatus for improving the power dissipation of a semiconductor device

Dual current sensing driver circuit with switching energization andflyback current paths

Draft control apparatus and method

Pulse width modulated driver

Method and apparatus for reconfiguring a computerized monitoring system

Apparatus for selectively positioning movable work element with preselected maximum velocity control

Voltage multiplier circuit

Method and apparatus for indicating faults in switch-type inputs

Position to duty cycle conversion apparatus and method

BETHLEHEM STEEL CORP

Well block centering tool

Furnace burden thermographic method and apparatus

Nozzle insert for a steelmaking ladle

Method and apparatus for removing a nozzle insert from a steelmaking ladle

Method and apparatus for installing a nozzle insert in a steelmaking ladle

Slag sensor taphole assembly

CATERPILLAR TRACTOR CO

Frequency signal conversion apparatus and method

Frequency/speed controller

Apparatus for controlling a member

Power supply circuit