Patent
Patentdatenbank Kanada
1886
1887 1888 1889 1890
1891 1892 1893 1894 1895 1896 1897 1898 1899 1900
1902 1903 1904 1905 1906 1907 1908 1909 1910
1911 1912 1913 1914 1915 1916 1917 1919 1920
1921 1922 1923 1924 1925 1926 1927 1928 1929 1930
1931 1932 1933 1934 1935 1936 1937 1938 1939 1940
1941 1942 1943 1944 1945 1946 1947 1948 1949 1950
1951 1952 1953 1954 1955 1956 1957 1958 1959 1960
1961 1962 1963 1964 1965 1966 1967 1968 1969 1971
1972 1973 1974 1976 1979 1982
2002