B31B 50/8142
Applying button-and-string or washer like closure elements
Official title: {Applying button-and-string or washer like closure elements}
B31B50/8142 (Applying button-and-string or washer like closure elements) appears on 4 US grants and 1 published applications in this corpus.
Search patents in B31B- Granted patents
- 4
- Published applications
- 1
- Assignees
- 4
- Inventors
- 6
- Latest grant
- 16 Feb 1993
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Method and apparatus for forming clasp envelopes16 Feb 1993US 5,186,705 AWinkler & Dunnebier
- Method and apparatus for the attachment of clasps to letter envelopes19 Feb 1991US 4,994,010 AWinkler & Dunnebier Maschinenfabrik und Eisengiesserei KG
- Reclosable envelope and method of manufacture22 Sep 1981US 4,290,547 AChampion International Corporation
- Apparatus for securing articles to film-like material24 Feb 1976US 3,940,307 AEastern Poly Packaging Company
Most cited
By later US patents
- Method and apparatus for the attachment of clasps to letter envelopes65US 4,994,010 AWinkler & Dunnebier Maschinenfabrik und Eisengiesserei KG · 1991
- Apparatus for securing articles to film-like material2US 3,940,307 AEastern Poly Packaging Company · 1976
- Method and apparatus for forming clasp envelopes1US 5,186,705 AWinkler & Dunnebier · 1993