B43K 21/045
With writing-cores automatically replaced from magazines
Official title: {with writing-cores automatically replaced from magazines}
B43K21/045 (With writing-cores automatically replaced from magazines) appears on 6 US grants and 1 published applications in this corpus.
Search patents in B43K- Granted patents
- 6
- Published applications
- 1
- Assignees
- 4
- Inventors
- 8
- Latest grant
- 7 May 2002
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Double chuck type mechanical pencil and internal writing mechanism thereof7 May 2002US 6,382,859 B1Kotobuki & Co., Ltd.
- Mechanical pencil with tapered supply chamber23 Jul 1991US 5,033,894 AMitsubishi Pencil Company, Limited
- Lead cartridge with an openable capping structure12 Mar 1991US 4,998,837 AKotobuki & Co., Ltd.
- Mechanical pencil with rotary discharge member10 Apr 1990US 4,915,521 ASaint Island International Patent & Law Offices
- Connector for propelling pencil5 Aug 1986US 4,603,991 AKotobuki & Co., Ltd.
Most cited
By later US patents
- Mechanical pencil with automatic and manual lead advance8US 4,149,813 AA. W. Faber-Castell · 1979
- Lead cartridge with an openable capping structure8US 4,998,837 AKotobuki & Co., Ltd. · 1991
- Double chuck type mechanical pencil and internal writing mechanism thereof3US 6,382,859 B1Kotobuki & Co., Ltd. · 2002
- Connector for propelling pencil1US 4,603,991 AKotobuki & Co., Ltd. · 1986