Hi Robert,
I have very good news for you - your grandfather's Jozef Półkownik and father's Antoni manifests are in Ellis Island database, open;
http://www.jewishgen.org/databases/eidb/ellisshort.html
and search manifests for;
Polkownik,Jozef Ibiwek, Russia 1909 40
pages 346 and 347,
and
Polkownik,Josef Bizyn, Russia 1913 46
with son; Polkownik, Antoni, 19y
pages 487 and 488.
Your grandfather traveled to USA few times -see info on second manifest.
Bizyn [it is bad spelling], probably it is Bierzyn near Izbica Kujawska.

Cordially,
Wladyslaw