Enter a clue or pattern or both:
The Clue
Mergenthaler patent of 1884 (8 letter answer)
The Answer
LINOTYPE
Tags
Notes
The answer LINOTYPE is so rare that it appears less than once every 2500 puzzles.
Definition
LINOTYPE as a noun:
1. (Linotype, Linotype machine) = a typesetting machine operated from a keyboard that casts an entire line as a single slug of metal