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| US4008113 | 20 May 1975 | 15 Feb 1977 | Kabel-und Metallwerke Gutehoffnungshutte Aktiengesellschaft | High voltage cable |
| US4014722 | 17 Jun 1974 | 29 Mar 1977 | Owens-Corning Fiberglas Corporation | Method of making electric conductor |
| US4185164 | 10 Jan 1978 | 22 Jan 1980 | | Voltage feed through apparatus having reduced partial discharge |
| US4440974 | 16 Jun 1982 | 3 Apr 1984 | Les Cables de Lyon | Electromechanical cable for withstanding high temperatures and pressures, and method of manufacture |
