Berol Corporation
103Patents
0Active
103Granted
39Portfolio score
Filing activity: Jul 18, 1974 → Sep 16, 2004
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6681933B1 | Writing utensil case | Human Necessities | 57 | Expired |
| USD476364S1 | Writing instrument | General | 56 | Expired |
| USD458640S1 | Wall file | General | 52 | Expired |
| USD478350S1 | Highlighter | General | 37 | Expired |
| USD330565S | Pen | General | 35 | Expired |
| US6637774B2 | Clipboard | Performing Operations; Transporting | 34 | Expired |
| USD478626S1 | Writing instrument | General | 32 | Expired |
| US6651827B1 | Brochure holder | Human Necessities | 31 | Expired |
| USD477025S1 | Writing instrument | General | 31 | Expired |
| USD471586S1 | Marker | General | 30 | Expired |
| USD366671S | Eraser having a sunburst | General | 29 | Expired |
| US6092672A | Desktop modular assembly | Performing Operations; Transporting | 28 | Expired |
| USD366672S | Eraser having a swirl | General | 28 | Expired |
| USD472576S1 | Writing instrument | General | 27 | Expired |
| USD508948S1 | Marker | General | 26 | Expired |
| USD476685S1 | Marker | General | 25 | Expired |
| USD411040S | School supply box | General | 21 | Expired |
| USD472575S1 | Marker pen | General | 19 | Expired |
| USD472922S1 | Writing instrument | General | 19 | Expired |
| USD352897S | School box | General | 19 | Expired |
| USD465519S1 | Writing instrument | General | 18 | Expired |
| USD478351S1 | Board eraser | General | 18 | Expired |
| USD469469S1 | Transfer tape dispenser | General | 18 | Expired |
| USD471233S1 | Grip for a marker | General | 18 | Expired |
| USD472271S1 | Cap for a marker pen | General | 17 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.