On Thursday, April 25, 2013 8:07:05 PM UTC+2, threeneurons wrote: > > > Here's some references from Randall Logan's site: > http://www.scientificsolutions.ca/patents.htm > <http://www.scientificsolutions.ca/patents.htm> > A single lit plate, such as an "exit" sign, goes back to 1914, but the > multiplate 10 numeral digit, was applied for, in 1954. That, however, was > in the U.S. It doesn't address patents in other countries. >
Thanks! I've updated the Wikipedia article with this, http://en.wikipedia.org/wiki/Lightguide_display#History It seems like the Swedish display from 1953 must have been home-made. The large distance between each digit is perhaps a give-away. A commercially sold component would have been made more space efficient. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msg/neonixie-l/-/8mW19VlLKscJ. For more options, visit https://groups.google.com/groups/opt_out.
