ON THE ANALYSIS OF LIBRARY GROWTH
87
TABLE III
U.S. Invention Patents Issued
1790-1966
Date Number |
Date |
Number |
Date |
Number |
Date Number |
Date Number | |||
1790 |
3 |
1830 |
544 |
1870 |
12137 |
1910 |
35141 |
1950 |
43040 |
1791 |
33 |
1831 |
573 |
1871 |
11659 |
1911 |
32856 |
1951 |
44326 |
1792 |
11 |
1832 |
474 |
1872 |
12180 |
1912 |
36198 |
1952 |
43616 |
1793 |
20 |
1833 |
586 |
1873 |
11616 |
1913 |
33917 |
1953 |
40468 |
1794 |
22 |
1834 |
630 |
1874 |
12230 |
1914 |
39892 |
1954 |
33809 |
1795 |
12 |
1835 |
752 |
1875 |
13291 |
1915 |
43118 |
1955 |
30432 |
1796 |
44 |
1836 |
702 |
1876 |
14169 |
1916 |
43892 |
1956 |
46817 |
1797 |
51 |
1837 |
426 |
1877 |
12920 |
1917 |
40935 |
1957 |
42744 |
1798 |
28 |
1838 |
514 |
1878 |
12345 |
1918 |
38452 |
1958 |
48330 |
1799 |
44 |
1839 |
404 |
1879 |
12125 |
1919 |
36797 |
1959 |
52408 |
1800 |
41 |
1840 |
458 |
1880 |
12903 |
1920 |
37060 |
1960 |
47170 |
1801 |
44 |
1841 |
490 |
1881 |
15500 |
1921 |
37798 |
1961 |
48368 |
1802 |
65 |
1842 |
488 |
1882 |
18091 |
1922 |
38369 |
1962 |
55691 |
1803 |
97 |
1843 |
493 |
1883 |
21162 |
1923 |
к 38616 |
1963 |
45679 |
1804 |
84 |
1844 |
478 |
1884 |
19118 |
1924 |
42574 |
1964 |
47376 |
1805 |
57 |
1845 |
473 |
1885 |
23285 |
1925 |
46432 |
1965 |
62857 |
1806 |
63 |
1846 |
566 |
1886 |
21767 |
1926 |
44733 |
1966 |
68406 |
1807 |
99 |
1847 |
495 |
1887 |
20403 |
1927 |
41717 | ||
1808 |
158 |
1848 |
583 |
1888 |
19551 |
1928 |
42357 | ||
1809 |
203 |
1849 |
984 |
1889 |
23324 |
1929 |
45267 | ||
1810 |
223 |
1850 |
883 |
1890 |
25313 |
1930 |
45226 | ||
1811 |
215 |
1851 |
752 |
1891 |
22312 |
1931 |
51756 | ||
1812 |
238 |
1852 |
885 |
1892 |
22647 |
1932 |
53458 | ||
1813 |
181 |
1853 |
844 |
1893 |
22750 |
1933 |
48774 | ||
1814 |
210 |
1854 |
1755 |
1894 |
19855 |
1934 |
44420 | ||
1815 |
173 |
1855 |
1881 |
1895 |
20856 |
1935 |
40618 | ||
1816 |
206 |
1856 |
2302 |
1896 |
21822 |
1936 |
39782 | ||
1817 |
174 |
1857 |
2674 |
1897 |
22067 |
1937 |
37683 | ||
1818 |
222 |
1858 |
3455 |
1898 |
20377 |
1938 |
38061 | ||
1819 |
156 |
1859 |
4160 |
1899 |
23278 |
1939 |
43073 | ||
1820 |
155 |
1860 |
4357 |
1900 |
24644 |
1940 |
42238 | ||
1821 |
168 |
1861 |
3020 |
1901 |
25546 |
1941 |
41109 | ||
1822 |
200 |
1862 |
3214 |
1902 |
27119 |
1942 |
38449 | ||
1823 |
173 |
1863 |
3773 |
1903 |
31029 |
1943 |
31054 | ||
1824 |
228 |
1864 |
4630 |
1904 |
30258 |
1944 |
28053 | ||
1825 |
304 |
1865 |
6088 |
1905 |
29775 |
1945 |
25695 | ||
1826 |
323 |
1866 |
8863 |
1906 |
31170 |
1946 |
21803 | ||
1827 |
331 |
1867 |
12277 |
1907 |
35859 |
1947 |
20139 | ||
1828 |
368 |
1868 |
12526 |
1908 |
32735 |
1948 |
23963 | ||
1829 |
447 |
1869 |
12931 |
1909 |
36561 |
1949 |
35131 |