Inventors:
Charles Thomas Gorman - Mahtomedi MN, US
David W. France - Omaha NE, US
Clifton Lachmansingh - South Haven MN, US
Paul John Warosh - Plymouth MN, US
Donald L. Greenwood - Bradenton FL, US
Joseph C. Walsh - Boulder CO, US
Nicholas P. Lupfer - Lakewood CO, US
John Dougherty Culter - Naples FL, US