If they are, they aren't in the same state where they use their PO Boxes:

- Butterfly Labs "Address": PO Box 413671 Kansas City, Missouri 64141-3761
    Missouri Business Entities : Result - no Butterfly Labs

-  btcfpga "Address": P.O. Box 246 Hannibal, NY 13074
    New York Business Entities : Result - no BTCFPGA