Category:Wilhelm Hellesen
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Danish inventor (1836-1892) | |||||
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Date of birth | 2 February 1836 Kalundborg Vilhelm Louis Frederik Hellesen | ||||
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Date of death | 22 December 1892 Frederiksberg | ||||
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Danish inventor
Media in category "Wilhelm Hellesen"
The following 2 files are in this category, out of 2 total.
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Battery-patent-US439151.png 875 × 1,329; 58 KB
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Frederik Louis Wilhelm Hellesen.jpg 235 × 285; 18 KB