Number | Date | Country | Kind |
---|---|---|---|
42 38 571.7 | Nov 1992 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
4231287 | Smiley | Sep 1980 | |
4382386 | Coussot et al. | May 1983 |
Number | Date | Country |
---|---|---|
0 381 046 | Aug 1990 | EPX |
0 474280 | Nov 1992 | EPX |
961680 | May 1950 | FRX |
1 174 795 | Mar 1959 | FRX |
38 02 545 | Aug 1989 | DEX |
39 20 788 | Dec 1990 | DEX |
Entry |
---|
Japanese Patent Abstract, Kenji Kobayashi, "Process For Making Diaphragm by Photoetching", Oct. 21, 1976. |