Patent classifications
G
PHYSICS
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G05
CONTROLLING; REGULATING
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G05B
CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
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G05B11/36
with provision for obtaining particular characteristics, e.g. proportional, integral, differential
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G05B11/42
for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
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