Amusement devices: games – Aerial projectile game; game element or accessory therefor... – Target
Patent
1978-06-21
1979-09-18
Grieb, William H.
Amusement devices: games
Aerial projectile game; game element or accessory therefor...
Target
273156, G09B 2328, A63F 906
Patent
active
041678230
ABSTRACT:
A puzzle for teaching coagulation theory including three separable units representing the intrinsic, extrinsic and common coagulation pathways. Each of said units further including separable members representing the coagulation factors, said members, when assembled correctly, representing the order in which the factors interact.
REFERENCES:
patent: 2981009 (1961-04-01), Lindquist
patent: 2996832 (1961-08-01), Rubin
patent: 3271879 (1966-09-01), Sackler
patent: 3614106 (1971-10-01), Morrison
Fishel Grace J.
Grieb William H.
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