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| US4258287 | 13 Jun 1979 | 24 Mar 1981 | General Electric Company | Circular fluorescent lamp unit |
| US4278911 | 13 Jun 1979 | 14 Jul 1981 | General Electric Company | Circular fluorescent lamp unit |
| US4316120 | 22 Oct 1980 | 16 Feb 1982 | General Electric Company | Circular fluorescent lamp unit |
| US6630779 | 1 Jun 2000 | 7 Oct 2003 | General Electric Company | Fluorescent lamp with discharge tube bent substantially in plane |
| USD631600 | 11 May 2010 | 25 Jan 2011 | Lumiette Inc. | Flat panel lamp with mounting hole |