Inventor · Königstein, DE

Otto Zapf

49Patents
19h-index
2Co-inventors
71Inventor score

Filing activity: Oct 24, 1974 → Jun 8, 2005

Most-cited inventions

PatentTitleAreaCited byStatus
USD382735S Side panel General 94 Expired
US4362336A Sliding chair Human Necessities 64 Expired
US4452486A Chair type furniture Human Necessities 63 Expired
US5649739A Backrest for a seat arrangement Performing Operations; Transporting 56 Expired
US4285544A Furniture construction Emerging Cross-Sectional Technologies 42 Expired
USD328680S Shelf or similar article General 37 Expired
USD305582S Divider panel for a work station or the like General 35 Expired
USD360786S Seat General 35 Expired
USD323251S Combined desk, wall panel and storage unit General 29 Expired
US5112108A Seating furniture Human Necessities 27 Expired
USD294318S Table General 27 Expired
USD330641S Combined desk, wall panel and storage unit General 26 Expired
USD327794S Cabinet for office furniture General 25 Expired
US3951453A Seating device having a weighted cushion Emerging Cross-Sectional Technologies 24 Expired
USD330295S Combined dual work surface, wall panel and storage unit General 23 Expired
USD503560S1 Stacking chair General 22 Expired
USD251526S Combined desk and work storage unit General 22 Expired
USD303458S Partition unit General 21 Expired
USD331335S File cabinet General 20 Expired
USD402143S Drawer panel General 19 Expired
US7445288B2 Vehicle seat Performing Operations; Transporting 16 Expired
USD243896S Chairs General 15 Expired
USD346072S Rolling chair General 15 Expired
USD373273S Seat General 15 Expired
USD322898S Arm chair General 15 Expired

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.