Patent assignee · JP · COMPANY

Kanda Optical Co., Ltd.

5Patents
0Active
5Granted
26Portfolio score

Filing activity: Feb 28, 1985 → Dec 22, 1995

Most-cited patents

PatentTitleAreaCited byStatus
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.