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988. Citations on U.S. Patents to the U.S. Scientific & Technical Literature, by Cited Field

[Citations to articles with authors in different sectors are assigned fractionally to participating sectors. Citations are to articles published in a twelve-year period, lagged by three years from the patent data. For example, 1997 citations are to articles published in 1993-95]

 
Number of citations to scientific and technical articles
Science field
1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998
 
    Total 8,618 9,498 12,988 12,936 15,720 19,425 26,721 27,437 32,536 47,142 74,839 108,335
Physics 1,286 1,595 2,356 2,169 2,424 2,667 3,024 3,589 3,366 3,506 4,150 4,719
Chemistry 1,181 1,212 1,536 1,673 1,921 2,451 3,027 3,114 3,689 4,535 6,218 6,900
Earth & space science 105 81 119 76 123 94 93 122 134 195 207 285
Mathematics 0 2 2 3 2 18 21 14 19 25 30 35
Biology 168 220 304 306 437 436 548 677 812 1,349 1,508 2,426
Biomedical research 2,390 2,749 3,976 3,818 5,199 6,945 10,735 10,332 12,719 20,646 36,397 55,891
Clinical medicine 2,221 2,423 3,190 3,415 4,205 5,293 7,393 7,215 9,173 13,637 22,649 33,437
Engineering technology 1,242 1,209 1,458 1,443 1,401 1,492 1,850 2,346 2,593 3,207 3,589 4,452
Psychology 21 3 38 30 2 24 26 15 25 11 52 91
Social sciences 1 0 2 0 0 1 0 0 0 1 0 10
Health & professional fields 1 2 4 1 2 1 0 10 2 24 33 88


Source: CHI Research, Inc., Haddon Heights, NJ; Science Indicators Database; and U.S. National Science Foundation, special tabulation.

http://www.nsf.gov/sbe/srs/stats.htm



https://allcountries.org/uscensus/988_citations_on_u_s_patents_to.html

These tables are based on figures supplied by the United States Census Bureau, U.S. Department of Commerce and are subject to revision by the Census Bureau.

Copyright © 2006 Photius Coutsoukis and Information Technology Associates, all rights reserved.