Number | Date | Country | Kind |
---|---|---|---|
15189/72 | Oct 1972 | CH |
This is a division of application Ser. No. 404,582 filed Oct. 9, 1973, now U.S. Pat. No. 3,900,520.
Number | Name | Date | Kind |
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3883572 | Helmlinger et al. | May 1975 |
Number | Date | Country |
---|---|---|
531,313 | Jan 1973 | CH |
531,559 | Jan 1973 | CH |
Number | Date | Country | |
---|---|---|---|
Parent | 404582 | Oct 1973 |