Wikipedia mentions: Pober Sport Ace, Little Audrie and Acro Sport.
The Pober Sport Ace was developed from the Corben Baby Ace, single-seater, parasol monoplane, etc.
Both Corben and Poberzeny also developed 2-seater variants of the Ace.
Starting in 1973, Poberezny developed the Pober Pixie which was also a parasol and looked like a cross between a Corben Baby Ace and a Leslie Long Parasol.
Paul Poberezny also designed a series of biplanes based on the (1930s vintage) Gere Sport. The EAA Biplane (P-1) was a single-seater, designed by a team of engineers led by Paul. An updated version was called the EAA AcromSport Biplane, soon followed by the EAA Acro Sport 2 biplane. All were capable of mild aerobatics.
In 1953, Paul rebuilt an old (Ben Howard) midget racer into "Little Audrie" with Luscombe wings.
All of Paul Poberezny's airplane used a mixture of construction methods: steel tube fuselages surrounded by wooden formers covered with fabric. Wings usually had wooden spars and ribs covered with fabric.
Most used near-stock Continental or Lycoming, flat-four aircraft engines ranging in horsepower from 40 to 180 horsepower.
Visit the EAA Museum (Oshkosh, Wisconsin) to see most of Paul's prototypes.