KOTOBUKI & CO., LTD.
320Patents
57Active
320Granted
45Portfolio score
Filing activity: Jun 9, 1977 → Apr 26, 2023 · 16 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6055780A | Retractable stairs-like stand | Fixed Constructions | 79 | Expired |
| USD410030S | Writing instrument | General | 74 | Expired |
| USD444498S | Writing instrument | General | 71 | Expired |
| USD402693S | Writing instrument | General | 68 | Expired |
| USD338039S | Writing instrument | General | 67 | Expired |
| USD355673S | Writing instrument | General | 61 | Expired |
| USD453187S1 | Writing instrument | General | 61 | Expired |
| USD390872S | Combined computer input pen and writing instrument with cap member therefor | General | 59 | Expired |
| USD394455S | Writing instrument | General | 58 | Expired |
| USD436996S | Writing instrument | General | 54 | Expired |
| USD410682S | Writing instrument | General | 53 | Expired |
| USD452274S | Writing instrument | General | 52 | Expired |
| USD491983S1 | Writing instrument | General | 52 | Expired |
| USD408057S | Writing instrument | General | 51 | Expired |
| USD382016S | Writing instrument | General | 49 | Expired |
| USD418871S | Writing instrument | General | 47 | Expired |
| USD397723S | Writing instrument | General | 46 | Expired |
| USD460485S1 | Knock-type painting implement | General | 45 | Expired |
| USD445131S | Writing instrument | General | 44 | Expired |
| USD441015S | Writing instrument | General | 44 | Expired |
| USD412014S | Writing instrument | General | 43 | Expired |
| USD377664S | Writing instrument | General | 42 | Expired |
| USD417891S | Writing instrument | General | 42 | Expired |
| USD397150S | Writing instrument | General | 42 | Expired |
| USD487773S1 | Writing instrument | General | 41 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.