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
Priority claimed from FI831800Aexternal-prioritypatent/FI72383C/en
Application filed by Halton OyfiledCriticalHalton Oy
Application grantedgrantedCritical
Publication of ATE29061T1publicationCriticalpatent/ATE29061T1/en