Advertisement for Schmitt Stix products has three black and white photographs of skateboarders and Schmitt Stix Yardstick skateboard and text discussing Schmitt Stix products. Paul Schmitt of PS Stix, owns and operates one of the largest and most successful skateboard manufacturing companies in the United States and is known to many in the industry as 'Professor Schmitt". For almost 30 years Schmittâs company has been considered an innovative leader in design and manufacturing of high quality skateboards.