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Nitton Biso Co., Ltd. Patents
Nitton Biso Co., Ltd.
Tokyo, JP
No. of patents:

Patent Number Title Of Patent Date Issued
5332195 Rope traction device July 26, 1994
A rope traction device has a sheave which is driven and rotated to cause a traction rope to be wound on the sheave and thereby moves along the traction rope. The rope traction device includes a pair of annular side plates made of an elastic material and provided at sides of the sheave in

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