Class B43K : IMPLEMENTS FOR WRITING OR DRAWING
Subclass 5/08: Pens with ink reservoirs in holders, e.g. fountain-pens (nibs or writing-points with ink reservoirs B43K 1/01; ball-point pens B43K 7/00; pens with writing-points other than nibs or balls B43K 8/00; multiple-point writing implements B43K 27/00) Ink reservoirs with movable pistons with ink-supplying valves
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 10889143 | Refillable writing instrument | Aug 24, 17 | Jan 12, 21 | Not available |
| 6409405 | Fountain pen with leak proof piston converter | Jan 28, 00 | Jun 25, 02 | A.T. CROSS COMPANY, LLC |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2022/0379,651 | Writing Instrument | May 26, 22 | Dec 01, 22 | Not available |
| 2019/0241,006 | REFILLABLE WRITING INSTRUMENT | Aug 24, 17 | Aug 08, 19 | Not available |
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