Signal device for food package
United States Patent 2951764
US Patent References:
Telltale for frozen food packages
- - 2460215

Temperature indicator
- - 2490933

Defrosting indicator
- - 2560537


Inventors:
Chase, Kenneth J.
Publication Date:
09/06/1960
View Patent Images:
Assignee:
Chase, Kenneth J.
Primary Class:
Other Classes:
116/206
International Classes:
G01N31/22