Tsutomu Onuma
31Patents
17h-index
66Co-inventors
84Inventor score
Filing activity: May 6, 1980 → Sep 20, 2007
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5938954A | Submerged laser beam irradiation equipment | Performing Operations; Transporting | 69 | Expired |
| US5968701A | Toner and image forming method | Physics | 56 | Expired |
| US5977515A | Underwater laser processing device including chamber with partitioning wall | Performing Operations; Transporting | 51 | Expired |
| US7273686B2 | Toner | Physics | 43 | Expired |
| US7288354B2 | Toner | Physics | 38 | Expired |
| US6020102A | Positive-chargeable toner, image forming method and apparatus unit | Physics | 33 | Expired |
| US6120961A | Toner for developing electrostatic images | Physics | 33 | Expired |
| US5364722A | Toner for developing electrostatic image and heat-fixing method comprising a hydrocarbon wax | Emerging Cross-Sectional Technologies | 32 | Expired |
| US7351509B2 | Toner | Physics | 31 | Expired |
| US4499158A | Welded structural member having high erosion resistance | Emerging Cross-Sectional Technologies | 29 | Expired |
| US5384224A | Toner for developing electrostatic image | Physics | 26 | Expired |
| US4348131A | Welded structure having improved mechanical strength and process for making same | Emerging Cross-Sectional Technologies | 26 | Expired |
| US6007957A | Magnetic toner, image forming method and process cartridge | Physics | 20 | Expired |
| US6077638A | Toner and developer for developing electrostatic image, process for production thereof and image forming method | Emerging Cross-Sectional Technologies | 20 | Expired |
| US5605778A | Toner with wax component for developing electrostatic image | Physics | 19 | Expired |
| US7745089B2 | Process for producing toner, and toner | Physics | 18 | Active |
| US5628449A | Method of welding a carbon steel and an austenitic stainless steel together and resultant structure | Chemistry; Metallurgy | 17 | Expired |
| US6426169B1 | Toner containing azo iron compound | Physics | 13 | Expired |
| US6187496A | Toner and developer for developing electrostatic image, process for production thereof and image forming method | Emerging Cross-Sectional Technologies | 12 | Expired |
| US6589701B2 | Dry toner, image forming method and process cartridge | Physics | 11 | Expired |
| US6541174B1 | Method using toner and developer for developing electrostatic image | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6458499B1 | Toner having hydrocarbon wax with specific ester value and hydroxyl value | Physics | 11 | Expired |
| US5654992A | Method of repairing structural materials of nuclear reactor internals and apparatus therefor | Emerging Cross-Sectional Technologies | 11 | Expired |
| US5601411A | Stainless steel type 13Cr5Ni having high toughness, and usage the same | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6673506B2 | Toner production process | Physics | 10 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.