Number | Date | Country | Kind |
---|---|---|---|
55-69174 | May 1980 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3169085 | Newman | Feb 1965 | |
3375695 | Knapp | Apr 1968 | |
3496755 | Guernsey et al. | Feb 1970 |
Number | Date | Country |
---|---|---|
54-145349 | Jan 1978 | JPX |
Entry |
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Japanese Laid-Open Patent Application #145,349, published 1979. |