Inventor · disambiguated record
John P. Hoffman
Also filed as: HOFFMAN JOHN · HOFFMAN JOHN P · HOFFMAN JOHN PAUL
30 granted patents·2 pending applications·1,153 citations·filing 1979–2021
98Inventor score
Files withCATERPILLAR INC18BETHLEHEM STEEL CORP6CATERPILLAR TRACTOR CO4BECTON DICKINSON CO1POSITEC POWER TOOLS SUZHOU CO LTD1
Top patents by PatentIndex Score
32 records- 0198USD384341SVehicle computer monitoring system screen and displayCATERPILLAR INC·Filed 1992·Granted Sep 30, 1997·127 cites·1 claims
- 0295US5949330AMethod and apparatus for displaying sensor outputs in a diagnostic systemCATERPILLAR INC·Filed 1993·Granted Sep 7, 1999·124 cites·15 claims
- 0394US4967309ADual current sensing driver circuitCATERPILLAR INC·Filed 1989·Granted Oct 30, 1990·59 cites·5 claims
- 0493US4661766ADual current sensing driver circuitCATERPILLAR INC·Filed 1985·Granted Apr 28, 1987·59 cites·7 claims
- 0589US5453939AComputerized diagnostic and monitoring systemCATERPILLAR INC·Filed 1992·Granted Sep 26, 1995·278 cites·2 claims
- 0689US5371487AMethod and apparatus for indicating a changed conditionCATERPILLAR INC·Filed 1993·Granted Dec 6, 1994·76 cites·44 claims
- 0786US4463437AFurnace burden thermographic method and apparatusBETHLEHEM STEEL CORP·Filed 1983·Granted Jul 31, 1984·57 cites·16 claims
- 0874US4383303AFrequency signal conversion apparatus and methodCATERPILLAR TRACTOR CO·Filed 1979·Granted May 10, 1983·19 cites·6 claims
- 0973US6508490B1Universal pipe-tank connection assemblyFiled 1999·Granted Jan 21, 2003·39 cites·5 claims
- 1070US5646373AApparatus for improving the power dissipation of a semiconductor deviceCATERPILLAR INC·Filed 1995·Granted Jul 8, 1997·51 cites·4 claims
- 1169US5335896ANozzle insert for a steelmaking ladleBETHLEHEM STEEL CORP·Filed 1993·Granted Aug 9, 1994·14 cites·24 claims
- 1266US5541806ADual current sensing driver circuit with switching energization andflyback current pathsCATERPILLAR INC·Filed 1994·Granted Jul 30, 1996·19 cites·4 claims
- 1365US4306449AApparatus for controlling a memberCATERPILLAR TRACTOR CO·Filed 1979·Granted Dec 22, 1981·16 cites·90 claims
- 1464US5321875AWell block centering toolBETHLEHEM STEEL CORP·Filed 1993·Granted Jun 21, 1994·25 cites·10 claims
- 1560US5546264AReverse voltage protection circuitCATERPILLAR INC·Filed 1994·Granted Aug 13, 1996·20 cites·5 claims
- 1657US5457435APulse width modulated driverCATERPILLAR INC·Filed 1994·Granted Oct 10, 1995·13 cites·8 claims
- 1756US4852657AApparatus for selectively positioning movable work element with preselected maximum velocity controlCATERPILLAR INC·Filed 1986·Granted Aug 1, 1989·19 cites·14 claims
- 1855US4348585AFrequency/speed controllerCATERPILLAR TRACTOR CO·Filed 1979·Granted Sep 7, 1982·10 cites·14 claims
- 1954US5040119ADraft control apparatus and methodCATERPILLAR INC·Filed 1990·Granted Aug 13, 1991·20 cites·13 claims
- 2054US2023364348A1Biasing Member for Medical Injection DeviceBECTON DICKINSON CO·Filed 2021·Application pending·0 cites
- 2149US5374917AComputerized monitoring system having a programmable gaugeCATERPILLAR INC·Filed 1993·Granted Dec 20, 1994·36 cites·11 claims
- 2247US4718644ASlag sensor taphole assemblyBETHLEHEM STEEL CORP·Filed 1984·Granted Jan 12, 1988·5 cites·8 claims
- 2344US2021255638A1Area Division and Path Forming Method and Apparatus for Self-Moving Device and Automatic Working SystemPOSITEC POWER TOOLS SUZHOU CO LTD·Filed 2020·Application pending·0 cites
- 2441US5361059AMethod and apparatus for modifying the functionality of a gaugeCATERPILLAR INC·Filed 1993·Granted Nov 1, 1994·21 cites·10 claims
- 2540US4394723APower supply circuitCATERPILLAR TRACTOR CO·Filed 1981·Granted Jul 19, 1983·5 cites·12 claims
- 2639US6181111B1Permanent magnet alternator system for battery chargingFiled 1999·Granted Jan 30, 2001·15 cites·16 claims
- 2736US5369392AMethod and apparatus for indicating faults in switch-type inputsCATERPILLAR INC·Filed 1992·Granted Nov 29, 1994·6 cites·17 claims
- 2834US4982315AVoltage multiplier circuitCATERPILLAR INC·Filed 1990·Granted Jan 1, 1991·3 cites·6 claims
- 2933US5337470AMethod and apparatus for removing a nozzle insert from a steelmaking ladleBETHLEHEM STEEL CORP·Filed 1993·Granted Aug 16, 1994·6 cites·21 claims
- 3032US5327344AMethod and apparatus for reconfiguring a computerized monitoring systemCATERPILLAR INC·Filed 1992·Granted Jul 5, 1994·8 cites·19 claims
- 3130US5401004AMethod and apparatus for installing a nozzle insert in a steelmaking ladleBETHLEHEM STEEL CORP·Filed 1994·Granted Mar 28, 1995·2 cites·26 claims
- 3230US4682151APosition to duty cycle conversion apparatus and methodCATERPILLAR INC·Filed 1985·Granted Jul 21, 1987·1 cites·2 claims
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