Evolution of the

1
Evolution of the Inventive Step Requirement
Stringency of the Standard
1850
1875
1975
1950
1925
1900
2000
2
Evolution of the Inventive Step Requirement
Graham (1966)
Cuno (1941)
103
CAFC
Stringency of the Standard
Hotchkiss (1850)
United States
1850
1875
1975
1950
1925
1900
2000
3
Evolution of the Inventive Step Requirement
Graham (1966)
Cuno (1941)
103
CAFC
Stringency of the Standard
1977 statute
Hotchkiss (1850)
1949 statute
United States
1932 statute
England
1850
1875
1975
1950
1925
1900
2000
4
Evolution of the Inventive Step Requirement
Graham (1966)
Cuno (1941)
103
CAFC
Stringency of the Standard
1977 statute
Hotchkiss (1850)
1968 statute
1949 statute
United States
France
1932 statute
England
1850
1875
1975
1950
1925
1900
2000
5
Evolution of the Inventive Step Requirement
Graham (1966)
Nazi era
Cuno (1941)
103
CAFC
Stringency of the Standard
1977 statute
Hotchkiss (1850)
1968 statute
1949 statute
United States
France
1932 statute
England
1850
1875
1975
1950
1925
1900
2000
6
Evolution of the Inventive Step Requirement
Graham (1966)
Nazi era
Cuno (1941)
103
CAFC
Stringency of the Standard
1977 statute
Hotchkiss (1850)
1968 statute
1949 statute
United States
France
1932 statute
England
1850
1875
1975
1950
1925
1900
2000