I've been sifting through all the Novelty Piano publications that have been shared in this thread so far. Even though there are hundreds, there are still scores missing that I'm sure would be highly sought after by many, myself included. I have therefore decided to compile a list (a long one, indeed!
(1923) Nervous Nuckles — N. J. Elholm
(1924) Pettin' the Keys — A. Wylie
(1924) Piano Capers — A. Wylie
(1927) "Put'en [sic] on the Breaks!" — C. Olson
(1927) Stepping on the Ivories — J. McLaughlin
(1927) Tricks — A. Eldridge
(1928) Blue Lightning — C. Lapham
(1928) Coaxing the Ivories — R. Marine
(1928) Farmerette — J. Greer
(1928) Feather Fingers — C. Lapham
(1928) Louisiana Bo-Bo — T. Nixon
(1928) Lotta Trix — R. Marine
(1928) Manhattan Blues — R. Marine
(1928) Marine Syncopations — R. Marine
(1928) Mavis — C. Huerter
(1928) Melancholy Charlie — F. Crum
(1928) Miss Personality — C. Lapham
(1928) Missouri Squabble — E. Holst & S. Kretzmer
(1928) Mousie in the Piano — J. Keden
(1928) Runaway Fingers — A. Damesek
(1928) Will-O'-The-Wisp — B. Effros & P. Wall
(1929) Cafeteria Jangle — J. Buffano
(1929) A Modern Satire — H. Sosnik
(1929) Modernistique — C. Sansone
(1929) Off the Elbow — J. Keden
(1929) Pianogram — R. Rainger
(1929) Poker Chips — A. C. King
(1929) Rhythmic Fantasy — P. Saltman
(1929) Sky Blue — E. Bradley
(19??) Tryptica [sic] — S. Freund (aka. S. Hamy)