An apparatus for determining and recording a dose of an agent delivered with a syringe. The syringe has a barrel for holding the agent and a plunger movably positioned in the barrel for expelling the agent. The plunger includes a magnetically responsive element, such as an iron core. The...http://www.google.fr/patents/US5782814?utm_source=gb-gplus-shareBrevet US5782814 - Apparatus for determining and recording injection doses in syringes using electrical inductance
Apparatus for determining and recording injection doses in syringes using ...
