There are 5 New Kolb Aircraft KOLBRA 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 2003 and 2018.
N313KK
2018 Ben R Proffit KOLB KOLBRA
Lenoir, NC
N901BH
2016 Rathburn John KOLBRA
Lowell, AR
N20386
2003 German Mark W KOLB KOLBRA
Mound, MN
N24042
2003 Gitt Larry Lee KOLB KOLBRA
New Kent, VA
N408CP
Petty Paul KOLBRA
Scottsboro, AL