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Patent
1,984
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Patent
1,984
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1,977
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5
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1
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1
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UNT Libraries Government Documents Department
1,977
UNT College of Arts and Sciences
5
Moody Medical Library, UT
1
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1
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1,536
Office of Scientific & Technical Information Technical Reports
441
UNT Scholarly Works
6
Texas Cultures Online
1
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Texas Patents
1,536
Office of Scientific & Technical Information Technical Reports
441
UNT Scholarly Works
6
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1
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1,539
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1,526
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Texas
1,526
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1
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1
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1
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1
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1
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1
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Dallas County, TX
133
Harris County, TX
99
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59
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50
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45
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42
Travis County, TX
31
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133
Harris County, TX
99
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59
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50
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45
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42
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31
El Paso County, TX
30
Jefferson County, TX
25
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21
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20
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19
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19
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19
Ellis County, TX
18
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16
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15
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15
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14
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14
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13
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13
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13
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13
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12
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11
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11
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11
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11
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11
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10
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10
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10
Bowie County, TX
9
Cass County, TX
9
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9
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9
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8
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8
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8
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8
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8
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7
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7
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7
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7
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7
Taylor County, TX
7
Tom Green County, TX
7
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6
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6
Erath County, TX
6
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6
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6
Angelina County, TX
5
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5
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5
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5
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4
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4
Camp County, TX
4
Clay County, TX
4
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4
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4
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4
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4
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4
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4
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4
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4
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4
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4
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4
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4
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4
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4
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4
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4
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4
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4
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4
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3
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3
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3
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3
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3
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3
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3
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3
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3
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3
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3
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3
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3
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3
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3
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3
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3
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3
Allegheny County, PA
2
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2
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2
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2
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2
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2
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2
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2
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2
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2
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2
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2
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2
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2
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2
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2
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2
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2
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2
Philadelphia County, PA
2
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2
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2
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2
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2
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2
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2
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2
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2
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2
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1
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1
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1
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1
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1
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1
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1
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1
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1
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1
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1
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1
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1
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1
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1
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1
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1
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1
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1
Decade
2010-2019
5
2000-2009
6
1990-1999
436
1930-1939
1
1920-1929
62
1910-1919
498
1900-1909
387
1890-1899
294
1880-1889
194
1870-1879
90
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2010-2019
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2000-2009
6
1990-1999
436
1930-1939
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1920-1929
62
1910-1919
498
1900-1909
387
1890-1899
294
1880-1889
194
1870-1879
90
1860-1869
7
1850-1859
4
Year
2016
1
2013
3
2012
1
2008
1
2005
2
2004
2
2002
1
1998
15
1997
41
1996
34
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2013
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2012
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2008
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2005
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2002
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1998
15
1997
41
1996
34
1995
39
1994
39
1993
24
1992
102
1991
102
1990
40
1935
1
1922
4
1921
30
1920
28
1919
64
1918
55
1917
38
1916
55
1915
43
1914
61
1913
40
1912
46
1911
42
1910
54
1909
53
1908
50
1907
49
1906
39
1905
40
1904
28
1903
47
1902
26
1901
29
1900
26
1899
28
1898
25
1897
37
1896
34
1895
27
1894
24
1893
33
1892
22
1891
35
1890
29
1889
36
1888
22
1887
19
1886
20
1885
21
1884
23
1883
14
1882
13
1881
10
1880
16
1879
16
1878
6
1877
15
1876
6
1875
7
1874
12
1873
10
1872
4
1871
8
1870
6
1869
3
1867
2
1866
1
1865
1
1859
3
1858
1
Month
December
1,984
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December
1,984
Day
31st
412
30th
47
29th
59
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57
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47
24th
50
23rd
37
22nd
40
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31st
412
30th
47
29th
59
28th
57
27th
68
26th
46
25th
47
24th
50
23rd
37
22nd
40
21st
46
20th
43
19th
58
18th
36
17th
45
16th
41
15th
60
14th
58
13th
46
12th
62
11th
42
10th
52
9th
46
8th
61
7th
46
6th
52
5th
68
4th
49
3rd
53
2nd
36
1st
103
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Automatic Rotary Hydraulic Casing-Spear.
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