Average Co-Inventor Count = 1.79
ph-index = 4
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. Toyotomi Kogyo Co., Ltd. (12 from 86 patents)
2. Toyotomi Co., Ltd. (3 from 21 patents)
15 patents:
1. D452731 - Oil-fired space heater
2. D452730 - Oil-fired space heater
3. D336816 - Portable cooking and heating stove
4. D310408 - Oil fired space heater
5. D305260 - Electric radiant heater
6. 4872829 - Fire-extinguishing device for oil burner
7. D301163 - Oil-fired space heater or similar article
8. 4810185 - Fire-extinguishing device for oil burner
9. 4797088 - Safety device for oil burner
10. 4775437 - Process of forming cylinder wall of burning cylinder for use in heating
11. 4740153 - Fire-extinguishing device for oil burner
12. 4611574 - Protective guard for oil burner
13. 4569652 - Combustion cylinder construction for oil space heater
14. 4424019 - Device for vertically moving the wick of an oil burner
15. 4390003 - Petroleum combustion device