| Patents for B43K 7 - Ball-point pens (3,207) | |
|---|---|
| 08/1976 | |
| 08/03/1976 | US3972630 Writing implement |
| 06/1976 | |
| 06/29/1976 | US3966336 Ball type marker construction which eliminates stick-slip phenomena |
| 06/01/1976 | US3960455 Flexible double ball-point pen |
| 04/1976 | |
| 04/20/1976 | US3951555 Modular writing pen |
| 03/1976 | |
| 03/30/1976 | US3947137 Socket for a ball point pen |
| 03/30/1976 | US3947136 Pressure control means for fluid applicator |
| 03/23/1976 | US3945735 Socket for holding the writing ball of a ball point pen |