Railways – Derailment guards – Guide rollers
Patent
1987-06-01
1988-03-08
Scherbel, David A.
Railways
Derailment guards
Guide rollers
104 35, 1052151, B61F 900, B60S 1302
Patent
active
047293225
ABSTRACT:
Apparatus to travel on primary rails includes:
REFERENCES:
patent: 715791 (1902-12-01), Happe
patent: 1545747 (1925-07-01), Easton
patent: 1761747 (1930-06-01), Rosin et al.
patent: 2727102 (1955-12-01), Sawyer
patent: 3012521 (1961-12-01), Lich
patent: 3152559 (1964-10-01), Harshberger
patent: 3191552 (1965-06-01), Koci
patent: 3672308 (1972-06-01), Segar
patent: 3797401 (1974-03-01), Alimanestianv
patent: 3817186 (1974-06-01), Walsh
Haefliger William W.
Hajec Donald T.
Harshberger Donald W.
Scherbel David A.
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