Per Olov Risman
26Patents
11h-index
22Co-inventors
75Inventor score
Filing activity: Feb 13, 1975 → May 4, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5834744A | Tubular microwave applicator | Emerging Cross-Sectional Technologies | 129 | Expired |
| US5632921A | Cylindrical microwave heating applicator with only two modes | Electricity | 91 | Expired |
| US5828040A | Rectangular microwave heating applicator with hybrid modes | Electricity | 35 | Expired |
| US4743725A | Coaxial line microwave heating applicator with asymmetrical radiation pattern | Electricity | 31 | Expired |
| US4276462A | Microwave heating apparatus | Electricity | 23 | Expired |
| US4841111A | Microwave oven with improved defrosting mode | Electricity | 21 | Expired |
| US6614010B2 | Microwave heating apparatus | Performing Operations; Transporting | 17 | Expired |
| US4237145A | Method of preparing foodstuffs containing coagulating proteins and a device for performing the method | Human Necessities | 14 | Expired |
| US4392039A | Dielectric heating applicator | Electricity | 14 | Expired |
| US6833537B2 | Microwave system for heating voluminous elongated loads | Electricity | 13 | Expired |
| US5237139A | Microwave oven, a method for excitation of the cavity of a microwave oven, and a wave guide device for carrying out the method | Emerging Cross-Sectional Technologies | 12 | Expired |
| US6960747B2 | Microwave applicator system | Electricity | 11 | Expired |
| US8269190B2 | Method and system for achieving optimal UV water disinfection | Chemistry; Metallurgy | 10 | Active |
| US6933482B2 | Microwave heating apparatus | Performing Operations; Transporting | 9 | Expired |
| US4027133A | Microwave radiators | Electricity | 9 | Expired |
| US4485564A | Method of carrying out the drying of wooden objects | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US4816632A | Multi-resonant microwave oven having an improved microwave distribution | Electricity | 6 | Expired |
| US6333496A | Microwave feeding of an oven cavity | Electricity | 4 | Expired |
| US7230217B2 | Hybrid rectangular heating applicators | Electricity | 4 | Expired |
| US7015441B2 | Microwave heating apparatus | Performing Operations; Transporting | 3 | Expired |
| US4011427A | Electric supply circuits for a microwave oven | Electricity | 3 | Expired |
| US4849592A | Feeding arrangement for a microwave oven | Electricity | 3 | Expired |
| US6630654B2 | Microwave heating apparatus | Chemistry; Metallurgy | 1 | Expired |
| US7964828B2 | Microwave heating applicator | Electricity | 0 | Active |
| US4855554A | Arrangement in a microwave oven | Electricity | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.