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VISUAL INDICATION OF TEMPERATURE CHANGE
US 3,433,075 A
Filed
: 01/30/1967
Issued
: 03/18/1969
Est. Priority Date
: 03/25/1966
Status: Expired due to Term
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Current Assignee
Sutherland William Drummond
Original Assignee
Sutherland William Drummond
Inventors
SUTHERLAND WILLIAM DRUMMOND
Application Number
US04/612,529
Time in Patent Office
778 Days
Field of Search
US Class Current
116/216
CPC Class Codes
G01K 11/06
using melting, freezing, or...
G01K 11/12
using changes in colour, tr...
G01W 1/00
Meteorology
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