I Thought You Were Supposed To Trademark Excel!

Apparently, Microsoft forgot to file for a trademark for Excel, the spreadsheer program it has sold for 19 years. Well, getting sick of companies creating software with Excel in the name that seemes affiliated with MS, they filed for one in April to beat TurboExcel. Microsoft had told Sawysoft, the company which publishes the software, to cease-and-decist using the name, and Sawysoft discovered MS had no claim. I can see why it would they would decide not to register it, since excel is a regular word, but it was probably a bad idea. I'm sure they registered "Word", didn't they?