DO PATENT POOLS ENCOURAGE INNOVATION? EVIDENCE ...
DO PATENT POOLS ENCOURAGE INNOVATION? EVIDENCE ...
DO PATENT POOLS ENCOURAGE INNOVATION? EVIDENCE ...
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FIGURE 7 – POOL SUBCLASS AND POOL MEMBER <strong>PATENT</strong>S<br />
200<br />
Pool Start Year<br />
35<br />
16<br />
Pool Start Year<br />
2.5<br />
180<br />
30<br />
14<br />
160<br />
140<br />
25<br />
12<br />
2<br />
Industry Patents<br />
120<br />
100<br />
80<br />
20<br />
15<br />
Pool Patents<br />
Industry Patents<br />
10<br />
8<br />
6<br />
1.5<br />
1<br />
Pool Patents<br />
60<br />
40<br />
10<br />
4<br />
0.5<br />
20<br />
5<br />
2<br />
0<br />
0<br />
0<br />
0<br />
1921 1923 1925 1927 1929 1931 1933 1935 1937 1939 1941 1943 1945 1947<br />
1921 1923 1925 1927 1929 1931 1933 1935 1937 1939 1941 1943 1945 1947<br />
80<br />
Industry Patents Pool Patents<br />
Industry Patents Pool Patents<br />
High Tension Cables (1930-48) Water Conditioning (1930-51)<br />
Pool Start Year<br />
16 14<br />
Pool Start Year<br />
2.5<br />
70<br />
14<br />
12<br />
2<br />
60<br />
12<br />
10<br />
Industry Patents<br />
50<br />
40<br />
30<br />
10<br />
8<br />
6<br />
Pool Patents<br />
Industry Patents<br />
8<br />
6<br />
1.5<br />
1<br />
Pool Patents<br />
20<br />
4<br />
4<br />
0.5<br />
10<br />
2<br />
2<br />
0<br />
0<br />
0<br />
0<br />
1921 1923 1925 1927 1929 1931 1933 1935 1937 1939 1941 1943 1945 1947<br />
1921 1923 1925 1927 1929 1931 1933 1935 1937 1939 1941 1943 1945 1947<br />
70<br />
Industry Patents Pool Patents<br />
Industry Patents Pool Patents<br />
Fuel Injection (1931-42) Pharmaceuticals (1932-45)<br />
4.5<br />
140<br />
Pool Start Year<br />
Pool Start Year<br />
25<br />
60<br />
4<br />
120<br />
3.5<br />
20<br />
50<br />
3<br />
100<br />
Industry Patents<br />
40<br />
30<br />
2.5<br />
2<br />
Pool Patents<br />
Industry Patents<br />
80<br />
60<br />
15<br />
10<br />
Pool Patents<br />
1.5<br />
20<br />
40<br />
1<br />
5<br />
10<br />
0.5<br />
20<br />
0<br />
0<br />
0<br />
0<br />
1921 1923 1925 1927 1929 1931 1933 1935 1937 1939 1941 1943 1945 1947<br />
1921 1923 1925 1927 1929 1931 1933 1935 1937 1939 1941 1943 1945 1947<br />
Industry Patents<br />
16<br />
14<br />
12<br />
10<br />
8<br />
6<br />
4<br />
2<br />
Industry Patents Pool Patents<br />
Industry Patents Pool Patents<br />
Railroad Springs (1932-47) Textile Machines (1932-50)<br />
3.5<br />
Pool Start Year<br />
3<br />
2.5<br />
2<br />
1.5<br />
1<br />
0.5<br />
Pool Patents<br />
Industry Patents<br />
9<br />
Pool Start Year<br />
8<br />
7<br />
6<br />
5<br />
4<br />
3<br />
2<br />
1<br />
2.5<br />
2<br />
1.5<br />
1<br />
0.5<br />
Pool Patents<br />
0<br />
0<br />
0<br />
0<br />
1921 1923 1925 1927 1929 1931 1933 1935 1937 1939 1941 1943 1945 1947<br />
1921 1923 1925 1927 1929 1931 1933 1935 1937 1939 1941 1943 1945 1947<br />
Industry Patents Pool Patents<br />
Industry Patents Pool Patents<br />
Hydraulic Oil Pumps (1933-52) Machine Tools (1933-52)<br />
4
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