I seem to clearly remember hearing many years ago that Spam () sued Microsoft (or AOL, or another popular email service at the time) for using the word 'spam' to refer to junk email. They said it was of detriment to their brand.
Searching now, however, I can't find any info about a lawsuit; and only a small amount of information about their dissatisfaction with the matter (although sales purportedly increased afterwards).
What is the true story behind this? Was there a lawsuit or settlement in the 90's?