Takashi Hamamoto
21Patents
10h-index
34Co-inventors
75Inventor score
Filing activity: Dec 16, 1977 → Aug 5, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4481244A | Material used to bear writing or printing | Emerging Cross-Sectional Technologies | 52 | Expired |
| US5623476A | Recording device and reproduction device | Emerging Cross-Sectional Technologies | 52 | Expired |
| US4957061A | Plurality of beam producing means disposed in different longitudinal and lateral directions from each other with respect to a substrate | Chemistry; Metallurgy | 36 | Expired |
| US4798694A | Method for producing composite materials | Performing Operations; Transporting | 30 | Expired |
| US4496629A | Material used to bear writing or printing | Emerging Cross-Sectional Technologies | 27 | Expired |
| US4592980A | Photoconductive layer having hydrophilic and hydrophobic moieties | Physics | 15 | Expired |
| US6334915B1 | Copper alloy sheet for electronic parts | Chemistry; Metallurgy | 12 | Expired |
| US4802989A | System for purifying dye | Chemistry; Metallurgy | 11 | Expired |
| US4177784A | Engine starting device | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US4664815A | Ink production system | Performing Operations; Transporting | 10 | Expired |
| US5140398A | Switching device | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4698151A | Dyestuff refining system | Chemistry; Metallurgy | 9 | Expired |
| US4618561A | Monomolecular record memory medium with photosensitive diazonium salt | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4544580A | Method for recording by writing or printing with ink | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5498932A | Drive voltage generating circuit having a contrast control function | Electricity | 5 | Expired |
| US5359204A | Switching device | Electricity | 5 | Expired |
| US4572847A | Process for recording with ink on a material comprising a substrate having thereon a coating layer with micro-cracks | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4634628A | Recording medium and image recording process | Emerging Cross-Sectional Technologies | 3 | Expired |
| US4766047A | Optical recording medium and optical recording process using such medium | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4804613A | Optical recording medium and optical recording process using such medium | Emerging Cross-Sectional Technologies | 1 | Expired |
| US7123093B2 | Semiconductor integrated circuit | Electricity | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.