Inventor
Hisayuki Ushiyama
Inventor
Hiratsuka, JP
Overview
Patents· 10 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G03Gprimary
G03GElectrography59%
Y10TTechnical subjects covered by former us classification29%
G11BInformation storage based on relative movement between record carrier and transducer6%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests6%
PatentTitleYear
4,888,264'Process for preparing toner or capsule toner for use in electrophotography'19894,797,344'Encapsulated toner having shell with first vinyl polymer with Mn of 2000-225000 and second vinyl polymer with Mn of 1000-15000'19894,740,443'Encapsulated electrostatic toner with locally attached non-magnetic inorganic particles'19884,626,490'Encapsulated toner'19864,590,142'Capsule toner'19864,581,312'Pressure-fixable capsule toner comprising pressure fixable core material and vinyl polymer shell material'19864,565,764'Microcapsule toner and process of making same'19864,514,485'Developer for electrophotography having carrier particles, toner particles and electroconductive fine powders'19854,497,885'Pressure-fixable microcapsule toner'19854,254,201'Pressure sensitive adhesive toner of clustered encapsulated porous particles for use in electrostatic photography'1981Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1981Patents assigned to RICOH KK (1)· patent assignee history
1981Based in Tokyo, JP· patent location history
1985–1989Patents assigned to CANON KK (9)· patent assignee history
1985–1989Based in Hiratsuka, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CANON KK | 9 | 1985–1989 |
| RICOH KK | 1 | 1981 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hiratsuka, JP | 9 | 1985–1989 |
| Tokyo, JP | 1 | 1981 |