Inventor
Keiji Yamamoto
Inventor
Ibaraki, JP
Overview
Patents· 7 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
A61Kprimary
A61KPreparations for medical, dental or toiletry purposes43%
A61PSpecific therapeutic activity of chemical compounds or medicinal preparations21%
C07CAcyclic or carbocyclic compounds7%
C07DHeterocyclic compounds7%
C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium7%
C08BPolysaccharides7%
Y10TTechnical subjects covered by former us classification7%
PatentTitleYear
8,506,992'Percutaneous absorption-type pharmaceutical preparations'20137,964,213'Patch and production method thereof'20116,117,447'Percutaneous absorption type preparation'20005,688,931'Polysaccharide derivatives and drug carriers'19975,639,472'Percutaneous absorption preparation'19975,268,492'Optically active diphosphines, intermediates thereof, and processes for production thereof'19933,966,899'Method of treatment of medicines'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–2013Patents assigned to YAMAMOTO KEIJI (2)· patent assignee history
1976Based in Tsukisamu-Higashi 2-jyo, Toyohira-ku, Sapporo-shi, Hokkaido, JP· patent location history
1993Based in Yokohama, JP· patent location history
1997–2013Patents assigned to NITTO DENKO CORP (4)· patent assignee history
1997–2000Patents assigned to HOKURIKU PHARMACEUTICAL (2)· patent assignee history
1997Patents assigned to DRUG DELIVERY SYSTEM INST LTD (1)· patent assignee history
1997Based in Chiba, JP· patent location history
1997Based in Osaka, JP· patent location history
2000–2013Based in Ibaraki, JP· patent location history
2013Patents assigned to KAWASHIMA TOORU (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| NITTO DENKO CORP | 4 | 1997–2013 |
| HOKURIKU PHARMACEUTICAL | 2 | 1997–2000 |
| YAMAMOTO KEIJIself | 2 | 1976–2013 |
| DRUG DELIVERY SYSTEM INST LTD | 1 | 1997 |
| KAWASHIMA TOORU | 1 | 2013 |
Locations
| Location | Patents | Span |
|---|---|---|
| Ibaraki, JP | 3 | 2000–2013 |
| Chiba, JP | 1 | 1997 |
| Osaka, JP | 1 | 1997 |
| Yokohama, JP | 1 | 1993 |
| Tsukisamu-Higashi 2-jyo, Toyohira-ku, Sapporo-shi, Hokkaido, JP | 1 | 1976 |