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USPTO Patent Rankings Data through Dec 31, 2025
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John W. Schaefer — 14 Patents

TITa Instruments: 6 patents #3 of 21Top 15%
CFContour Fabricators: 3 patents #3 of 15Top 20%
WLWaters Investments Limited: 2 patents #41 of 112Top 40%
TITa Instruments-Waters: 1 patents #26 of 54Top 50%
RTX (Raytheon): 1 patents #8,290 of 15,912Top 55%
Des Plaines, IL: #58 of 807 inventorsTop 8%
Illinois: #6,113 of 84,256 inventorsTop 8%
Overall (All Time): #332,869 of 4,157,543Top 9%
14 Patents All Time
John W. Schaefer has been granted 14 US patents while listed as an inventor at Ta Instruments. The first was granted in 1980 and the most recent in July 2009. John W. Schaefer ranks #332,869 of 4,157,543 US inventors in our database (top 8.0%). Patent records list John W. Schaefer in Des Plaines, IL, US.

Issued Patents All Time

Showing 1–14 of 14 patents

Patent #TitleCo-InventorsDate
7566167 System and method for a thermogravimetric analyzer having improved dynamic weight baseline Robert L. Danley 2009-07-28
7458117 Protective cover and patient security apparatus 2008-12-02
7416328 System and method for a thermogravimetric analyzer having improved dynamic weight baseline Robert L. Danley 2008-08-26
7175900 Reinforced pad and method of making 2007-02-13
6723036 Methods and apparatus for folding sheet material Richard A. Weaver, Michael G. Howe 2004-04-20
6578367 Liquid nitrogen cooling system Mark Heyman 2003-06-17
6523998 Thermal analysis assembly with distributed resistance and integral flange for mounting various cooling devices Robert L. Danley 2003-02-25
5915283 Metallic sheet insulation system Kevin J. Reed, Robert L. Danley 1999-06-22
5890788 Anamophic optical system Chungte W. Chen, Ronald G. Hegg, Jonathan L. Dugdale 1999-04-06
5842788 Differential scanning calorimeter Robert L. Danley, John R. Reader, Jr. 1998-12-01
5710426 Dynamic and thermal mechanical analyzer having an optical encoder with diffraction grating and a linear permanent magnet motor Kevin J. Reed, Robert L. Danley, John R. Reader, Jr. 1998-01-20
5321719 Thermogravimetric apparatus Kevin J. Reed, Michael J. Levchak 1994-06-14
5288147 Thermopile differential thermal analysis sensor Robert L. Danley 1994-02-22
4213770 Engine emission pollutant separator 1980-07-22