Number | Date | Country | Kind |
---|---|---|---|
3-104523 | May 1991 | JPX |
Number | Name | Date | Kind |
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2401189 | Quiroz | May 1946 | |
3274944 | Parsons | Sep 1966 | |
4871304 | Iida et al. | Oct 1989 | |
5141423 | Aikawa et al. | Aug 1992 |
Number | Date | Country |
---|---|---|
0376049 | Jul 1990 | EPX |
0067490 | Mar 1990 | JPX |
Entry |
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Patent Abstracts of Japan vol. 14, No. 91 (M-938)(4034) of Feb. 20, 1990. |