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USPTO Patent Rankings Data through Dec 31, 2025
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Stuart T. Spence — 28 Patents

3S3D Systems: 22 patents #9 of 374Top 3%
UNUnknown: 2 patents #12,644 of 83,584Top 20%
La Cañada Flintridge, CA: #18 of 465 inventorsTop 4%
California: #19,067 of 386,348 inventorsTop 5%
Overall (All Time): #134,628 of 4,157,543Top 4%
28 Patents All Time
Stuart T. Spence has been granted 28 US patents while listed as an inventor at 3D Systems. The first was granted in 1991 and the most recent in May 2005. Stuart T. Spence ranks #134,628 of 4,157,543 US inventors in our database (top 3.2%). Patent records list Stuart T. Spence in La Cañada Flintridge, CA, US.

Issued Patents All Time

Showing 1–25 of 28 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6891562 Optical design for film conversion device Harry Tarnoff 2005-05-10
6864913 Method and apparatus for a reconfigurable digital processor for film conversion Harry Tarnoff 2005-03-08
6829012 Method and apparatus for a digital parallel processor for film conversion Harry Tarnoff 2004-12-07
6724420 Portable film conversion device Harry Tarnoff 2004-04-20
6611293 Method and apparatus for synchronization of ancillary information in film conversion Harry Tarnoff 2003-08-26
6600965 Method and apparatus for production of high resolution three-dimensional objects by stereolithography Charles W. Hull, David J. Albert, Dennis R. Smalley, Richard A. Harlow, Phil Stinebaugh +5 more 2003-07-29 $2,129,000
6048487 Recoating stereolithographic layers Thomas A. Almquist, Charles W. Hull, Borzo Modrek, Paul F. Jacobs, Charles W. Lewis +5 more 2000-04-11 $1,049,000
6048188 Stereolithographic curl reduction Charles W. Hull, Charles W. Lewis, Wayne Vinson, Raymond S. Freed, Dennis R. Smalley 2000-04-11 $1,049,000
5891382 Recoating of stereolithographic layers Thomas A. Almquist, Charles W. Hull, Borzo Modrek, Paul F. Jacobs, Charles W. Lewis +5 more 1999-04-06
5870307 Method and apparatus for production of high resolution three-dimensional objects by stereolithography Charles W. Hull, David J. Albert, Dennis R. Smalley, Richard A. Harlow, Phil Stinebaugh +5 more 1999-02-09 $1,277,000
5772947 Stereolithographic curl reduction Charles W. Hull, Charles W. Lewis, Wayne Vinson, Raymond S. Freed, Dennis R. Smalley 1998-06-30
5651934 Recoating of stereolithographic layers Thomas A. Almquist, Charles W. Hull, Borzo Modrek, Paul F. Jacobs, Charles W. Lewis +2 more 1997-07-29 $1,862,000
5610824 Rapid and accurate production of stereolithographic parts Wayne A. Vinson, Frank F. Little, Wolfgang Schwarzinger, Mark Lewis, Yehoram Uziel +1 more 1997-03-11 $566,000
5495328 Apparatus and method for calibrating and normalizing a stereolithographic apparatus Thomas A. Almquist, Harry Tarnoff, Warren Juran 1996-02-27 $2,835,000
5345391 Method and apparatus for production of high resolution three-dimensional objects by stereolithography Charles W. Hull, David J. Albert, Dennis R. Smalley, Richard A. Harlow, Phil Stinebaugh +5 more 1994-09-06 $1,154,000
5273691 Stereolithographic curl reduction Charles W. Hull, Charles W. Lewis, Wayne Vinson, Raymond S. Freed, Dennis R. Smalley 1993-12-28 $1,381,000
5267013 Apparatus and method for profiling a beam 1993-11-30 $1,358,000
5184307 Method and apparatus for production of high resolution three-dimensional objects by stereolithography Charles W. Hull, David J. Albert, Dennis R. Smalley, Richard A. Harlow, Phil Stinebaugh +5 more 1993-02-02
5182056 Stereolithography method and apparatus employing various penetration depths Dennis R. Smalley 1993-01-26
5164128 Methods for curing partially polymerized parts Borzo Modrek, Brent Parker 1992-11-17
5137662 Method and apparatus for production of three-dimensional objects by stereolithography Charles W. Hull, Borzo Modrek, Brent Parker, Raymond S. Freed, Thomas A. Almquist +10 more 1992-08-11
5133987 Stereolithographic apparatus and method Charles W. Lewis, Mark Lewis 1992-07-28
5123734 Apparatus and method for calibrating and normalizing a stereolithographic apparatus Thomas A. Almquist, Harry Tarnoff 1992-06-23
5104592 Method of and apparatus for production of three-dimensional objects by stereolithography with reduced curl Charles W. Hull, Charles W. Lewis, Wayne A. Vinson, Raymond S. Freed, Dennis R. Smalley 1992-04-14
5076974 Methods of curing partially polymerized parts Borzo Modrek, Brent Parker 1991-12-31