Masaaki Fukuda
53Patents
13h-index
48Co-inventors
84Inventor score
Filing activity: Aug 27, 1973 → Apr 28, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3936595A | Signal transmission system for transmitting programed information such as programed instruction | Electricity | 134 | Expired |
| US3988528A | Signal transmission system for transmitting a plurality of information signals through a plurality of transmission channels | Electricity | 128 | Expired |
| US6055111A | Plastic lens and method of making a plastic lens | Physics | 83 | Expired |
| US5185092A | Lubricating oil for refrigerator | Chemistry; Metallurgy | 75 | Expired |
| US4146854A | High frequency attenuator using ferrite beads | Electricity | 34 | Expired |
| US5905599A | Optical lens having a hygroscopicity adjusting part | Physics | 31 | Expired |
| US5936782A | Objective lens for a pickup optical system | Physics | 23 | Expired |
| US7166552B2 | Method for producing aluminum magnesium titanate sintered product | Chemistry; Metallurgy | 22 | Expired |
| US3991265A | Signal editing and processing apparatus | Electricity | 21 | Expired |
| US5982565A | Plastic lens and method of making the same | Performing Operations; Transporting | 19 | Expired |
| US6008955A | Optical lens | Physics | 18 | Expired |
| US3932698A | Multiplex signal transmission system | Electricity | 18 | Expired |
| US5995304A | Plastic lens | Physics | 17 | Expired |
| US7011788B2 | Method for producing aluminum titanate sintered object | Chemistry; Metallurgy | 13 | Expired |
| US6403019B1 | Process for preparing sintered body of aluminum titanate | Chemistry; Metallurgy | 13 | Expired |
| US6010647A | Multifocal lens and method of making the same | Performing Operations; Transporting | 12 | Expired |
| US6034827A | Optical lens | Physics | 11 | Expired |
| US6078430A | Optical lens and method of making the same | Performing Operations; Transporting | 10 | Expired |
| US7148168B2 | Method for producing aluminum titanate sintered compact | Chemistry; Metallurgy | 10 | Expired |
| US7550025B2 | Honeycomb filter for clarifying exhaust gas and method for manufacture thereof | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6822803B2 | Optical component with multiple glass optical elements and manufacturing method thereof | Physics | 9 | Expired |
| US5975882A | Molded optical component with gate stubs removed from peripheral rim portions | Emerging Cross-Sectional Technologies | 8 | Expired |
| US6088160A | Diffractive optical element | Physics | 7 | Expired |
| US9201894B2 | Data distribution system | Physics | 6 | Active |
| USRE42352E1 | Method for producing aluminum magnesium titanate sintered product | General | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.