1976-07-08
1977-12-13
Grieb, William H.
33 1AA, G09B 2502
Patent
active
040621308
ABSTRACT:
Mechanism modeling kit in which flat simulations of machine elements may be assembled into demonstration working units, some elements being pivotable relative to others on loosely tightened grommets.
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Torfason Louis E.
Wood George A.
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