Что-то http://ep.espacenet.com/advancedSearch?locale=en_EP артачится при попытке найти сей патент - говорит:
RESULT LIST
0 results found in the WO - esp@cenet database for:
DE19772526880 as the application number
или:
An error has occurred
Error Description
The page you tried to display caused an error.
Error message: There has been a problem whilst processing your query, please try again.
Буду оч. признателен за вразумление