HITACHI MAXELL, LTD.
1,231Patents
424Active
1,231Granted
53Portfolio score
Filing activity: May 29, 1973 → May 18, 2017 · 175 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4773740A | Electrochromic display device | Physics | 217 | Expired |
| US6837438B1 | Non-contact information medium and communication system utilizing the same | Physics | 199 | Expired |
| US5497488A | System for parallel string search with a function-directed parallel collation of a first partition of each string followed by matching of second partitions | Emerging Cross-Sectional Technologies | 174 | Expired |
| US4793695A | Electrochromic display device | Physics | 163 | Expired |
| US9311946B2 | Magnetic recording medium | Physics | 132 | Active |
| US6282081A | Electrode for capacitor, method for producing the same and capacitor | Emerging Cross-Sectional Technologies | 131 | Expired |
| US5786074A | Magnetic recording medium | Emerging Cross-Sectional Technologies | 113 | Expired |
| US7803471B1 | Magnetic tape, its cleaning method, and optical servotrack forming/cleaning apparatus | Physics | 112 | Active |
| US5113184A | Method and system of communication for a non-contact IC card | Physics | 111 | Expired |
| US6921592B2 | Magnetic recording medium comprising a magnetic layer having specific thickness, surface roughness and friction coefficient | Emerging Cross-Sectional Technologies | 111 | Expired |
| US6385407B1 | Accommodating enclosure and management system | Emerging Cross-Sectional Technologies | 103 | Expired |
| US8045288B2 | Tape drive with cartridge thickness detecting sensors | Physics | 95 | Active |
| US5537584A | Power instability control of a memory card and a data processing device therefor | Physics | 95 | Expired |
| US6344824B1 | Noncontact communication semiconductor device | Electricity | 89 | Expired |
| US5574273A | Non-contact system parallel data transfer system | Physics | 87 | Expired |
| US6615363B1 | Optical disk and method of recording on the same | Physics | 87 | Expired |
| US5932139A | Fluorescent substance, fluorescent composition, fluorescent mark carrier and optical reader thereof | Chemistry; Metallurgy | 86 | Expired |
| US7287715B2 | Magnetic tape cartridge | Emerging Cross-Sectional Technologies | 80 | Expired |
| US4911298A | Cassette storage container | Physics | 78 | Expired |
| US4962415A | IC card | Electricity | 78 | Expired |
| US7419315B2 | Lens device | Physics | 74 | Active |
| US5091618A | IC card reader/writer | Physics | 71 | Expired |
| US5550781A | Semiconductor apparatus with two activating modes of different number of selected word lines at refreshing | Physics | 71 | Expired |
| US7374101B2 | Adapter panel, electronic equipment, and cable connector identification system | Electricity | 70 | Active |
| US5867455A | Optical method and device for irradiating domains at predetermined positions | Physics | 64 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.