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Patents for Andrew G. Hjert
Patents 1 - 2 of 2
Number
Date
Patentee
Title
Type
1,515,483
Nov. 11, 1924
A.G. Hjert
Butt Gauge
butt gauges
1,593,826
Jul. 27, 1926
A.G. Hjert
Butt Gauge
butt gauges
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