Duplo Seizo Kabushiki Kaisa
8Patents
0Active
8Granted
24Portfolio score
Filing activity: Dec 20, 1983 → May 5, 1988
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4647029A | Paper sheet folding device | Performing Operations; Transporting | 15 | Expired |
| US4588181A | Double-feed prevention device in paper feeding apparatus | Performing Operations; Transporting | 8 | Expired |
| USD294598S | Paper folding apparatus | General | 7 | Expired |
| US4864211A | Drive control for DC electric motor | Physics | 6 | Expired |
| US4552353A | Double-feed prevention device in paper feeding apparatus | Performing Operations; Transporting | 6 | Expired |
| US4776580A | Drive mechanism for paper delivery rollers in an elevator-type sorter | Performing Operations; Transporting | 2 | Expired |
| US4772010A | Guide mechanism for paper sheets in an elevator type sorter | Performing Operations; Transporting | 0 | Expired |
| US4749091A | Shelf plate adapted for mounting on an office machine | Human Necessities | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.