Ryoko Co., Ltd.
7Patents
0Active
7Granted
25Portfolio score
Filing activity: Mar 12, 1982 → Nov 23, 1990
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4839051A | Method for treating water | Emerging Cross-Sectional Technologies | 69 | Expired |
| US4771572A | Method and apparatus for culturing plants | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4920694A | Method and apparatus for culturing plants | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5073257A | Apparatus for treating water | Emerging Cross-Sectional Technologies | 12 | Expired |
| USD275169S | Article of flatware | General | 9 | Expired |
| USD275168S | Article of flatware | General | 4 | Expired |
| USD275544S | Article of flatware | General | 2 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.