Patent
Patentdatenbank Niederlande
1800
1916
1919 1920
1921 1923 1924 1925 1926 1927 1930
1931 1933 1934 1935 1936 1937 1938 1939 1942
1943 1945 1948 1949 1952
1953 1955 1956 1957 1958 1959 1960
1961 1962 1963 1964 1965 1967 1968 1969 1970
1971 1973 1974 1975 1976 1977 1978 1981
1983 1984 1991
1994 1999