This application is a division of application for U.S. Letters Patent, Ser. No. 511,909 filed on July 8, 1983, now United States Pat. No. 4,490,544 issued on Dec. 25, 1984.
Number | Name | Date | Kind |
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2603560 | Stewart | Jul 1952 | |
2787631 | Stevens | Apr 1957 |
Number | Date | Country |
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49-110628 | Sep 1973 | JPX |
Number | Date | Country | |
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Parent | 511909 | Jul 1983 |