Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valtion TeknillinenfiledCriticalValtion Teknillinen
Priority to FI891067ApriorityCriticalpatent/FI81419C/en
Publication of FI891067A0publicationCriticalpatent/FI891067A0/en
Application grantedgrantedCritical
Publication of FI81419BpublicationCriticalpatent/FI81419B/en
Publication of FI81419CpublicationCriticalpatent/FI81419C/en
FI891067A1989-03-071989-03-07
Method and apparatus for preventing the freezing of liquid medium in a liquid space such as in a pipe system
FI81419C
(en)