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US 4031893

How Auto-Injectors Adjust Their Dose Using a Simple Spacer

A 1977 invention for auto-injectors that uses a physical spacer to adjust the amount of medicine inside the device before it is fired.

Statusexpired

Granted1977

Expires1996

Claims7

Forward citations108

Prior art7

AssigneeSurvival Technology Inc

InventorsSheldon Kaplan, George B. Calkins +2

Patent B

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