Number | Date | Country | Kind |
---|---|---|---|
87 11036 | Jul 1987 | FRX |
Number | Name | Date | Kind |
---|---|---|---|
3023203 | Dye | Feb 1962 | |
4640963 | Kreider et al. | Feb 1987 |
Number | Date | Country |
---|---|---|
1290555 | Mar 1962 | FRX |
61-81406 | Apr 1986 | JPX |
Entry |
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Translation of French Pat. 2,137,441 to Hartmann et al., published Dec. 29, 1972. |
Translation of Japanese Kokai Pub. No. 57-128706 to Kato et al., published Aug. 10, 1982. |