Pencell Co., Ltd.
2Patents
0Active
2Granted
19Portfolio score
Filing activity: Sep 29, 1988 → Jan 5, 1993
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5292202A | Retractable, refillable, sharpen-free pencil assembly | Performing Operations; Transporting | 7 | Expired |
| US4919556A | Writing implement having simplified lead-feeding mechanism | Performing Operations; Transporting | 2 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.