1893 - Thomas Edison received two U.S. patents. The first was for a "Cut Out for Incandescent Electric Lamps" and another for a "Stop Device" (No. 491,992-3). Also No. 492,150 for "Process of Coating Conductors for Incandescent Lamps."
... - moo
r^i = r + i
long r^i = r + ii or r + uu, depending on the region
l^i = l + r^i
(Sanskrit recognizes vocalic r (errr) and l (ulll), unlike, say, ...