Number | Date | Country | Kind |
---|---|---|---|
13748/69 | Sep 1969 | CH |
This is a division of application Ser. No. 464,416, filed Apr. 26, 1974, which in turn is a division of application Ser. No. 69,457, filed Sept. 8, 1970, now U.S. Pat. No. 3,819,712.
Number | Name | Date | Kind |
---|---|---|---|
2465882 | Kendall et al. | Mar 1949 | |
2586306 | Copenhaver | Feb 1952 | |
3723531 | Tobias et al. | Mar 1973 | |
3820975 | Poje | Jun 1974 | |
3845134 | Helmlinger et al. | Oct 1974 |
Number | Date | Country | |
---|---|---|---|
Parent | 464416 | Apr 1974 | |
Parent | 69457 | Sep 1970 |