Research Products Corp. (Madison, WI) recently announced several management appointments: — Larry Olsen to senior vice president; — Paul Graham to vice president of marketing and sales; — Brad Nielsen to sales director; — Sean McCarthy to sales manager; —Bruce Darkow to product manager for humidifiers, air cleaners, and fresh air exchangers; — Patti Wenger to product manager for filters (she will also handle international business development); and — Stuart Walker to product manager for paint arrestors and cooler pads.