Improvements in ampoule hypodermic syringes

140,755. Spahlinger, H. March 27, 1919, [Convention date]. Pumps, syringes, and like appliances.-An ampoule syringe, in which the fluid to be injected is separated from the needle and is held in a transparent container, comprises a glass tube a with a piston plug b having a capillary passage c in co...

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