Apple COO Tim Cook’s warning from early 2009 wasn’t the only one that handset makers received before Apple sicced the lawyers on HTC last week. According to a research note from Oppenheimer analyst Yal Reiner, Apple began warning top executives at companies such as HTC and Motorola in January that it wasn’t too happy about seeing allegedly iPhone-related IP showing up in proposed new products.

According to “industry checks,” Cook’s comments last January during the quarterly analyst call—that Apple “will not stand for having our IP ripped off, and we’ll use whatever weapons that we have at our disposal”—were taken seriously by the likes of LG, Samsung, and even Nokia. Though the Palm Pre openly flaunted multitouch capabilities (what most handset makers believed were at the heart of Cook’s warning), its sales numbers haven’t proven to be much of a concern for Apple so far.

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