FRONTIER-KEMPER CONSTRUCTORS, INC. Trademarks
JETCO
Filed: January 5, 1951
MINE SKIPS COMPRISING A VERTICAL BUCKET CARRIED ON A FRAME WHICH IS HOISTED VERTICALLY IN THE MINE SHAFT
Owned by: FRONTIER-KEMPER CONSTRUCTORS, INC.
Serial Number: 71608420
HOIST SAFETY SUPERVISOR
Filed: April 27, 1998
A computerized device that monitors hoist speed and position to provide overspeed and overwind protection on hoists and…
Owned by: FRONTIER-KEMPER CONSTRUCTORS, INC.
Serial Number: 75475267
