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."
... region
l^i = l + r^i
(Sanskrit recognizes vocalic r (errr) and l (ulll), unlike, say, English)
Diphthongs (Combinations of Simple Vowels)
e - hay
ai - aisle
o ...