-
Trolley attachment
-
Patent number 7,334,527
-
Issue date Feb 26, 2008
-
Frost, Inc.
-
Lee R Waldmiller
-
B61 - RAILWAYS
-
Journal bearing for trolley wheel
-
Patent number 6,880,469
-
Issue date Apr 19, 2005
-
Frost Inc.
-
Charles C. Frost
-
B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
-
Sealed bearing assembly
-
Patent number 4,863,293
-
Issue date Sep 5, 1989
-
Frost Inc.
-
Frederick R. Sytsma
-
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...