Title:
Automatically retractable needle syringe
United States Patent 3306290
Inventors:
Weltman, Harold S.
Application Number:
US34499664A
Publication Date:
02/28/1967
Filing Date:
02/14/1964
Assignee:
Weltman, Harold S.
Primary Class:
Other Classes:
604/201, 604/221, 604/227
International Classes:
A61M5/32; A61M5/24
View Patent Images:
US Patent References:
3046985Dental syringe adapter1962-07-31
2752918Hypodermic injection apparatus1956-07-03
2701566Injection apparatus1955-02-08
2460039Hypodermic syringe1949-01-25
Foreign References:
AU164214B