John H. Mortimer
40Patents
11h-index
29Co-inventors
75Inventor score
Filing activity: Aug 29, 1983 → Sep 10, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5901170A | Induction furnace | Electricity | 43 | Expired |
| US4506131A | Multiple zone induction coil power control apparatus and method | Electricity | 34 | Expired |
| US5495094A | Continuous strip material induction heating coil | Electricity | 28 | Expired |
| US6393044B1 | High efficiency induction melting system | Electricity | 27 | Expired |
| US4578552A | Levitation heating using single variable frequency power supply | Electricity | 26 | Expired |
| US5003551A | Induction melting of metals without a crucible | Emerging Cross-Sectional Technologies | 21 | Expired |
| US6121592A | Induction heating device and process for the controlled heating of a non-electrically conductive material | Electricity | 20 | Expired |
| US5272720A | Induction heating apparatus and method | Electricity | 17 | Expired |
| US5272719A | Plural output power supply for induction holding and melting furnaces | Electricity | 15 | Expired |
| US6542535B2 | Induction furnace with improved efficiency coil system | Emerging Cross-Sectional Technologies | 11 | Expired |
| US5090022A | Cold crucible induction furnace | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US6038157A | Fault tolerant power supply circuit | Electricity | 11 | Expired |
| US4745620A | Apparatus and method for maintaining constant molten metal level in metal casting | Performing Operations; Transporting | 10 | Expired |
| US6546039B2 | Simultaneous induction heating and stirring of a molten metal | Electricity | 9 | Expired |
| US6148019A | Modular high power induction heating and melting system | Electricity | 9 | Expired |
| US5550353A | Induction heating coil assembly for prevent of circulating current in induction heating lines for continuous-cast products | Electricity | 9 | Expired |
| US6798822B2 | Simultaneous induction heating and stirring of a molten metal | Electricity | 8 | Expired |
| US5257281A | Induction heating apparatus and method | Electricity | 8 | Expired |
| US6391247B1 | Flat inductors | Emerging Cross-Sectional Technologies | 6 | Expired |
| US8350198B2 | Heating and melting of materials by electric induction heating of susceptors | Mechanical Engineering; Lighting; Heating | 5 | Active |
| US4673025A | Apparatus and method for maintaining constant molten metal level in metal casting | Performing Operations; Transporting | 4 | Expired |
| US5787110A | Galvanizing apparatus with coreless induction furnace | Chemistry; Metallurgy | 3 | Expired |
| US7598632B2 | Current fed inverter with pulse regulator for electric induction heating, melting and stirring | Emerging Cross-Sectional Technologies | 3 | Active |
| US5987054A | Induction coil and coreless induction furnace employing same | Electricity | 2 | Expired |
| US7683288B2 | System and method of computing the operating parameters of a forge welding machine | Performing Operations; Transporting | 2 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.