Machines not elsewhere specified – Engine – Element or attachment
Patent
1989-04-17
1991-07-02
Zarfas, Louis S.
Machines not elsewhere specified
Engine
Element or attachment
D15 3
Patent
active
D03179230
REFERENCES:
patent: D115974 (1939-08-01), Arden
patent: D138311 (1944-07-01), Arden
patent: D253824 (1980-01-01), Hargrave
patent: 3653464 (1972-04-01), Jocobsen et al.
Seifert R. T.
Zarfas Louis S,.
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