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THWING INSTR Co

THWING INS

Active Patents

0

Total Holdings

4

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US1912242A	Potentiometer device for testing and calibrating meters	Expired / Lapsed	1929-11-26	1933-05-30	0	Details
US1883444A	Temperature indicating means	Expired / Lapsed	1926-11-26	1932-10-18	0	Details
US1734837A	Pyrometer	Expired / Lapsed	1925-09-03	1929-11-05	0	Details
US1730308A	Temperature-indicating means	Expired / Lapsed	1925-09-03	1929-10-01	0	Details