Patent assignee · JP · COMPANY

Itoki Corporation

100Patents
57Active
100Granted
49Portfolio score

Filing activity: Nov 9, 1979 → Jun 7, 2022 · 27 expiring within 5 years

Most-cited patents

PatentTitleAreaCited byStatus
US5314240A Shell structure for use with a chair having synchronously moving seat and seat back Emerging Cross-Sectional Technologies 98 Expired
USD701068S1 Chair General 86 Active
US5338099A Shell structure for use with a chair having synchronously moving seat and seat back Emerging Cross-Sectional Technologies 75 Expired
US4744600A Cushioning mechanism for use with seat of chair and interlocking cushioning mechanism for seat and backrest Human Necessities 64 Expired
US7794017B2 Chair having a unit to move a lumbar support Human Necessities 57 Active
USD510492S1 Desk General 53 Expired
US7896439B2 Chair Human Necessities 53 Active
USD656329S1 Chair General 52 Expired
US7293833B2 Chair and support mechanism unit thereof Human Necessities 52 Expired
USD710640S1 Chair General 49 Active
USD638635S1 Chair General 49 Expired
USD636614S1 Chair General 44 Expired
USD557917S1 Chair General 42 Expired
US4986601A Tilting mechanism for supporting seat portion and backrest of chair in integral fashion Human Necessities 39 Expired
USD727076S1 Chair General 38 Active
US8752896B2 Rocking chair Human Necessities 37 Active
USD346909S Chair General 36 Expired
USD405631S Table General 36 Expired
US5238294A Interlocking mechanism for supporting seat and seat back of chair Human Necessities 34 Expired
USD352851S Table General 34 Expired
USD824195S1 Desk General 32 Active
US5475376A Safety-deposit box system Physics 32 Expired
USD696886S1 Chair General 31 Active
USD834844S1 Chair General 29 Active
USD703459S1 Chair General 29 Active

Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.