B21D 53/76
Writing or drawing instruments
Official title: writing or drawing instruments, e.g. writing pens, erasing pens
B21D53/76 (Writing or drawing instruments) appears on 7 US grants and 6 published applications in this corpus.
Search patents in B21D- Granted patents
- 7
- Published applications
- 6
- Assignees
- 9
- Inventors
- 14
- Latest grant
- 30 May 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 2 |
| 2012 | 2 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 0 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Ball pen tip manufacturing machines, ball pen tips, and ball pens30 May 2023US 11,660,905 B2Kotobuki & Co., Ltd.
- Methods for manufacturing ball pen tips, ball pen tip manufacturing machines, ball pen tips and ball pens17 Nov 2020US 10,836,204 B1Kotobuki & Co., Ltd.
- Cooled turbine airfoil fabricated from sheet material14 May 2013US 8,439,647 B2Siemens Energy, Inc.
- Head attachment member, liquid ejection device, and head attachment method11 Sep 2012US 8,262,198 B2Seiko Epson Corporation
- Cast-in place ink feed structure using encapsulant7 Aug 2012US 8,235,500 B2Xerox Corporation
- Methods for manufacturing ball pen tips, ball pen tip manufacturing machines, ball pen tips and ball pens11 Mar 2021US 2021/0070094 A1Kotobuki & Co., Ltd.
- Head attachment member, liquid ejection device, and head attachment method4 Aug 2011US 2011/0187793 A1Seiko Epson Corporation
- Cooled Turbine Airfoil Fabricated From Sheet Material10 Mar 2011US 2011/0058934 A1Siemens Energy, Inc.
- Cast-in place ink feed structure using encapsulant26 Aug 2010US 2010/0214361 A1Xerox Corporation
- Cast-in place ink feed structure using encapsulant2 Oct 2008US 2008/0239002 A1Xerox Corporation
Most cited
By later US patents
- Cast-in place ink feed structure using encapsulant22US 8,235,500 B2Xerox Corporation · 2012
- Ballpoint pen refill and fabrication method thereof14US 5,984,559 AKabushiki Kaisha Pilot Corporation · 1999
- Method of manufacturing a cast-in place ink feed structure using encapsulant3US 7,735,225 B2Xerox Corporation · 2010
- Head attachment member, liquid ejection device, and head attachment method3US 8,262,198 B2Seiko Epson Corporation · 2012
- Methods for manufacturing ball pen tips, ball pen tip manufacturing machines, ball pen tips and ball pens2US 10,836,204 B1Kotobuki & Co., Ltd. · 2020