Number | Date | Country | Kind |
---|---|---|---|
8101408 | Mar 1981 | NLX |
Number | Name | Date | Kind |
---|---|---|---|
2465031 | Nathanson | Mar 1949 | |
2853653 | Williams | Sep 1958 | |
3324349 | Moerkens et al. | Jun 1967 | |
3986076 | Rottier | Oct 1976 | |
4017761 | Woldring | Apr 1977 | |
4039895 | Chermin et al. | Aug 1977 | |
4152628 | Rottier | May 1979 | |
4380719 | Di Bijl et al. | Apr 1983 |
Entry |
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"Fluorescent Lamp & Lighting" by Elenbaas et al., (1962), pp. 94-100, (Publisher Cleare-Hume Press London). |