B28B 21/68
And applying centrifugal forces
Official title: and applying centrifugal forces
B28B21/68 (And applying centrifugal forces) appears on 6 US grants and 1 published applications in this corpus.
Search patents in B28B- Granted patents
- 6
- Published applications
- 1
- Assignees
- 3
- Inventors
- 6
- Latest grant
- 6 Nov 2007
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 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 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method and apparatus of manufacturing electric pole6 Nov 2007US 7,290,338 B2Hammtek Asia, Inc.
- Apparatus for making reinforced concrete products11 Jun 1985US 4,522,579 A
- Method for making reinforced concrete products12 Mar 1985US 4,504,428 A
- Method and apparatus for making reinforced concrete products20 Sep 1983US 4,404,786 A
- Method of manufacturing prestressed concrete pipe12 Sep 1978US 4,113,823 ANippon Hume Pipe Company Limited
Most cited
By later US patents
- Method of manufacturing prestressed concrete pipe9US 4,113,823 ANippon Hume Pipe Company Limited · 1978
- Apparatus for making reinforced concrete products5US 4,522,579 A1985
- Prestressed concrete pipe3US 3,982,565 ANippon Hume Pipe Company Limited · 1976
- Method for making reinforced concrete products3US 4,504,428 A1985
- Method and apparatus for making reinforced concrete products2US 4,404,786 A1983