MITSUBISHI PENCIL COMPANY, LIMITED
558Patents
219Active
558Granted
51Portfolio score
Filing activity: Feb 11, 1976 → Mar 1, 2024 · 56 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5376251A | Carbon micro-sensor electrode and method for preparing it | Emerging Cross-Sectional Technologies | 352 | Expired |
| US5380422A | Micro-electrode and method for preparing it | Physics | 321 | Expired |
| USD404426S | Ball-point pen | General | 81 | Expired |
| USD497643S1 | Ballpoint pen | General | 79 | Expired |
| US6325781A | Puncturing device | Human Necessities | 73 | Expired |
| USD463821S1 | Ball-point pen | General | 71 | Expired |
| US6969376B2 | Safety indwelling needle | Human Necessities | 66 | Expired |
| USD460179S1 | Syringe needle for catheter | General | 66 | Expired |
| US4642102A | Injector | Human Necessities | 63 | Expired |
| USD453790S1 | Ball-point pen with a mechanical pencil | General | 59 | Expired |
| USD452526S | Ball-point pen | General | 56 | Expired |
| USD482724S1 | Ballpoint pen | General | 56 | Expired |
| USD461501S1 | Ball-point pen | General | 52 | Expired |
| USD313245S | Marking pen | General | 50 | Expired |
| USD483066S1 | Ballpoint pen | General | 50 | Expired |
| US5993098A | Aqueous gel ink-filled ball point pen | Performing Operations; Transporting | 48 | Expired |
| USD483067S1 | Ballpoint pen | General | 47 | Expired |
| US6234619A | Ink cartridge | Performing Operations; Transporting | 45 | Expired |
| US5803640A | Applicator | Human Necessities | 45 | Expired |
| USD496688S1 | Pen | General | 45 | Expired |
| USD454588S1 | Ball-point pen | General | 42 | Expired |
| USD450769S | Mechanical pencil | General | 42 | Expired |
| US4109398A | Construction type educational and amusement device | Human Necessities | 41 | Expired |
| US6048914A | Ink composition for writing instrument | Chemistry; Metallurgy | 40 | Expired |
| US6099629A | Water based ink and water based pigment ink having metallic lustrous color for ballpoint pen | Chemistry; Metallurgy | 40 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.