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2838644
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Patent Grant
2838644
References
Source
Patent Number
2,838,644
Date Filed
Not available
Date Issued
Tuesday, June 10, 1958
66 years ago
CPC
G05D23/2453 - using discharge tubes
Y10S236/14 - intermittant control
US Classifications
219 - Electric heating
236 - Automatic temperature and humidity regulation
361 - Electricity: electrical systems and devices
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