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Old 06-29-2015, 12:08 PM   #2
Happy Monkey
I think this line's mostly filler.
 
Join Date: Jan 2003
Location: DC
Posts: 13,575
The OCR on the page for the 1908 patent is bad, but the scans are interesting. It was apparently intended as a military signaling device for artillery. The first digit couldn't be more than 1, and the last two could be 00 or 50.
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