Number | Date | Country | Kind |
---|---|---|---|
197 16 762 | Apr 1997 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2127862 | Gebs | Aug 1938 | |
2199076 | LaSota | Apr 1940 | |
4694544 | Chapman | Sep 1987 |
Number | Date | Country |
---|---|---|
89 00 058 | Apr 1989 | DEX |
Entry |
---|
Phoenix Contact Innovation in Interference. (No Date). |