Ventilation tile
A Standard patent application filed on 19 December 1989 credited to Hesketh, Mark Lawrence
;
Alker, Peter
;
Wanner, Wendelin
;
Rottger, Wilhelm
;
Hofmann, Karl-Heinz
Details
Application number :
46926
Application type :
Standard
Application status :
LAPSED
Under opposition :
No
Proceeding type :
Invention title :
Ventilation tile
Inventor :
Hesketh, Mark Lawrence
;
Alker, Peter
;
Wanner, Wendelin
;
Rottger, Wilhelm
;
Hofmann, Karl-Heinz