04226235 is referenced by 115 patents and cites 6 patents.

A plural injecting device comprising an outer housing assembly, a plurality of cartridge sub-assemblies, and a corresponding plurality of releasable spring sub-assemblies for effecting a forward movement of the associated hypodermic needle into the user's muscle tissue and the associated liquid medicament dosage outwardly through the needle, the sub-assemblies being mounted within the outer housing assembly so that as a result of the actuation of one of the releasable spring sub-assemblies the other releasable spring sub-assembly will be actuated so as to insure a substantially simultaneous injection of the plural dosages contained within the device. A safety arrangement in some embodiments provides for selective individual or plural dosage injection.

Title
Plural injecting device
Application Number
6/6555
Publication Number
4226235
Application Date
January 25, 1979
Publication Date
October 7, 1980
Inventor
N Lawrence Dalling
Gaithersburg
MD, US
George B Calkins
Bethesda
MD, US
Stanley J Sarnoff
Bethesda
MD, US
Agent
Cushman Darby & Cushman
Assignee
Survival Technology
MD, US
IPC
A61M 5/00
View Original Source