In case of disagreement, especially on resignation, the proper basis of contractual bonus assessment, even if to some extent discretionary, can be negotiated or litigated.
Minimum contacts can be established by consent where a party signs a contract with a forum selection clause, agreeing to litigate in a specified forum.
Other manufacturers of non-round discs have litigated to dispute the validity of this patent and have produced examples of non-round discs that predate the patent.