4 ms·
That one is all over the net though. You can even view the original patent: http://www.google.com/patents/US3475623 http://www.google.com/patents/US3475623
by abruzzi 12y ago
That one is all over the net though. You can even view the original patent:
http://www.google.com/patents/US3475623 http://www.google.com/patents/US3475623