Number | Name | Date | Kind |
---|---|---|---|
4243545 | Campbell et al. | Jan 1981 |
Number | Date | Country |
---|---|---|
726668 | Jan 1966 | CAX |
0107354 | May 1984 | EPX |
20074 | Feb 1981 | JPX |
Entry |
---|
Derwent Abstract Accession No. 82-00031E/01, British Patent No. 2,082,454, Mar. 10, 1982. |
Derwent Abstract Accession No. 86-002083/01, Hungarian Patent No. T035714, Jul. 29, 1982. |
U.S. patent application Ser. No. 931,971 filed Nov. 24, 1986. |