Aerobic ski exerciser

Assignee

No assignee recorded.

Inventors

• Joseph A. Halfen (7 patents)
• Peter Haugen (8 patents)
• Lyle R. Hilk (7 patents)
• Michael R. Johnston (2 patents)
• Tianhong Ouyang (2 patents)
• Timothy J. Porth (19 patents)
• Alan Wetterlin (2 patents)

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