MEMORY-TECH HOLDINGS INC.
36Patents
29Active
36Granted
44Portfolio score
Filing activity: Sep 3, 1982 → Jan 2, 2020 · 6 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6041422A | Fault tolerant memory system | Physics | 27 | Expired |
| US5050169A | Method and apparatus for testing magnetic disks | Physics | 20 | Expired |
| US4603299A | Constant duty cycle peak detector | Physics | 18 | Expired |
| US4929894A | Method and apparatus for increasing throughput on disk drive quality control testing | Physics | 15 | Expired |
| US4533881A | Rapid starting variable frequency oscillator with minimum startup perturbations | Electricity | 8 | Expired |
| US9697863B2 | Information recording medium and reproduction device | Physics | 4 | Active |
| US7821908B2 | Optical disc, optical disc apparatus, and optical disc reproducing method | Physics | 4 | Active |
| US10043545B2 | Information recording medium and reproduction device | Physics | 3 | Active |
| US7652967B2 | Single-sided triple layer optical disc | Physics | 2 | Active |
| US7570566B2 | Optical disc, optical disc manufacturing method, and optical disc apparatus | Physics | 1 | Active |
| US7748050B2 | Optical disc, illegal copy finding system and method using optical disc, optical disc manufacturing apparatus and optical disc manufacturing method | Physics | 1 | Expired |
| US10636445B2 | Information recording medium and reproduction device | Physics | 1 | Active |
| US7433293B2 | Optical disc recording medium and method of manufacturing the same | Physics | 1 | Expired |
| US8913476B2 | Optical information recording medium having super-resolution film | Physics | 0 | Active |
| US9928868B2 | Optical disc having a plurality of recording layers | Physics | 0 | Active |
| US8792319B2 | Recording medium | Physics | 0 | Active |
| US7477592B2 | Optical disc, optical disc apparatus, optical disk reproducing method, and digital work publication | Physics | 0 | Active |
| US8699313B2 | Optical information recording medium having super-resolution film | Physics | 0 | Active |
| US9412408B2 | Optical information recording medium having first and second pit row of identical reflectance | Physics | 0 | Active |
| US9805761B2 | Reproducing device | Physics | 0 | Active |
| US9105278B2 | Optical information recording medium having super-resolution film | Physics | 0 | Active |
| US10068605B2 | Optical information recording medium having first and second pit row of identical reflectance | Physics | 0 | Active |
| US9978415B2 | Optical information recording medium having first and second pit rows of identical reflectance | Physics | 0 | Active |
| US8817587B2 | Optical information recording medium having super-resolution film | Physics | 0 | Active |
| US10192581B2 | Reproducing device | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.