Producing double-walled helically wound thermoplastic pipe with a corrugated wall
A Standard patent application filed on 11 July 1984 credited to Lupke, Manfred A.A.
Details
Application number :
30500
Application type :
Standard
Application status :
CEASED
Under opposition :
No
Proceeding type :
Invention title :
Producing double-walled helically wound thermoplastic pipe with a corrugated wall