Rail-engaging wheel conversion unit for road vehicles

Details Rail-engaging wheel conversion unit for road vehicles Rail-engaging wheel conversion unit for road vehicles

1997-06-23

1999-08-31

Spear, Robert M.

Transportation

Parts, accessories and attachments for vehicles not...

Chassis element

1216

Patent

active

D04132904

REFERENCES:
patent: D312059 (1990-11-01), Styles
patent: 3269331 (1966-08-01), Thompson
patent: 3581671 (1971-06-01), Hart
patent: 3980025 (1976-09-01), Olson, Sr. et al.
patent: 4534297 (1985-08-01), Johnson, Sr.
patent: 4708066 (1987-11-01), Heckman
patent: 5586507 (1996-12-01), Madison et al.
patent: 5660115 (1997-08-01), Shimon et al.
patent: 5756903 (1998-05-01), Norby et al.

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