Kanda Optical Co., Ltd.
5Patents
0Active
5Granted
26Portfolio score
Filing activity: Feb 28, 1985 → Dec 22, 1995
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5300963A | Structure for attaching member for protecting eyes from wind and dust | Human Necessities | 65 | Expired |
| US4886340A | Optical device for precision work | Physics | 19 | Expired |
| US4820035A | Collapsible spectacles | Physics | 18 | Expired |
| US5231429A | Foldable spectacle frame | Physics | 15 | Expired |
| US5640218A | Foldable spectacles with temple members having deformable earpieces for fitting into compact case | Physics | 10 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.