Anyone who has worked on patent prosecutions knows how the work generally gets done and billed. First, you hire a trusted U.S. firm to handle the overall prosecution effort. Then, that firm lines up the various other firms it works with to handle international work. The local firm coordinates and supervises the international work and also monitors the costs. Fees and costs incurred by the foreign firms are charged back to the primary prosecution firm, which passes the charges along to the client.
[more]
As noted in 
Back in the good old days when bashing BAPCPA was in vogue,