Wheelabrator designs, sells, and licenses some process (phosphate-based treatment systems) that keep heavy metals from industrial waste (such as incinerator ash) from leaching into drinking water. Forrester does too. Both have patents on their proprietary methods.
Wheelabrator licensed its system to a company that sublicensed it to a Taiwanese company, Kobin. That company was unhappy with the product, however, because it stank. Forrester, meanwhile, took that opportunity to develop a less smelly alternative, which it sold to Kobin, despite the existing deal with Wheelabrator.