DD66523A1 -
Temperature-dependent, self-acting ventilation device, in particular for opening the windows and flaps in cold frames, greenhouses od. Like.
- Google Patents
Temperature-dependent, self-acting ventilation device, in particular for opening the windows and flaps in cold frames, greenhouses od. Like.
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Application filed by Erich AugstfiledCriticalErich Augst
Priority to DD13164868ApriorityCriticalpatent/DD66523A1/en
Publication of DD66523A1publicationCriticalpatent/DD66523A1/en
DD13164868A1968-04-221968-04-22
Temperature-dependent, self-acting ventilation device, in particular for opening the windows and flaps in cold frames, greenhouses od. Like.
DD66523A1
(en)