There are 15 Piper J4 aircraft on the U.S. registry that TailWiki has a page for. Every one is built from the public FAA record — year, serial, engine, home base, and registration history — and owners and pilots add photos, trips, and stories on top. The ones listed here were built between 1938 and 1941.
N35880
1941 Piper J4
Waterloo, NE
N26890
1940 Piper J4
Locust Grove, GA
N27807
1940 Piper J4
Loveland, OH
N31193
1940 Piper J4
Napoleon, OH
N109N
1939 Piper J4
Cornell, IL
N22778
1939 Piper J4
Hackettstown, NJ
N25736
1939 Piper J4
Rhome, TX
N21599
1938 Piper J4
Viola, AR
N22703
1938 Piper J4
Middletown, DE
N22725
1938 Piper J4
Hanover, PA
N1759M
Piper J4
Clara City, MN
N21845
Piper J4
Harrington, DE
N26751
Piper J4
Mesa, AZ
N30424
Piper J4
Tybee Island, GA
N79H
Piper J4
Lisle, NY