Cite75_99 File -------------- Source: USPTO This file includes all US patent citations for utility patents granted in the period 1-Jan-75 to 31-Dec-99. No. of observations: 16,522,438 Variable Name variable type Characters Contents citing numeric 7 Citing Patent Number cited numeric 7 Cited Patent Number The file is sorted by Citing Patent Number. The size of the unzipped file is about 250 Mb.