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Stephen B. Kessler — 23 Patents

PSPneumatic Scale: 10 patents #1 of 38Top 3%
Becton, Dickinson And: 2 patents #1,271 of 2,926Top 45%
HEHemasure: 2 patents #6 of 18Top 35%
KPKendro Laboratory Products: 2 patents #15 of 77Top 20%
KOKontron: 1 patents #8 of 19Top 45%
MIMillipore: 1 patents #214 of 440Top 50%
Princeton, MA: #3 of 92 inventorsTop 4%
Massachusetts: #4,677 of 88,656 inventorsTop 6%
Overall (All Time): #178,160 of 4,157,543Top 5%
23 Patents All Time
Stephen B. Kessler has been granted 23 US patents while listed as an inventor at Pneumatic Scale. The first was granted in 1981 and the most recent in November 2025. Stephen B. Kessler ranks #178,160 of 4,157,543 US inventors in our database (top 4.3%). Patent records list Stephen B. Kessler in Princeton, MA, US.

Patents per Year

Patents granted per year, 1981 to 2025Bar chart with a peak of 4 patents in 2025.peak 41981: 1 patents19811982: 1 patents1985: 1 patents19851987: 1 patents1997: 1 patents19971998: 1 patents2000: 1 patents20002002: 1 patents2003: 1 patents20032008: 1 patents2009: 1 patents20092013: 1 patents2015: 1 patents20152019: 1 patents2021: 2 patents20212024: 3 patents2025: 4 patents2025

Issued Patents All Time

Showing 1–23 of 23 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12458985 Centrifuge system for separating cells in suspension T. David Marro 2025-11-04
12377423 Centrifuge system for separating cells in suspension T. David Marro 2025-08-05
12350686 Centrifuge system for separating cells in suspension T. David Marro 2025-07-08
12318710 Centrifuge system for separating cells in suspension T. David Marro 2025-06-03
11957998 Centrifuge system for separating cells in suspension T. David Marro 2024-04-16
11878312 Centrifuge system for separating cells in suspension T. David Marro 2024-01-23
11878311 Centrifuge system for separating cells in suspension T. David Marro 2024-01-23
11065629 Centrifuge system for separating cells in suspension T. David Marro 2021-07-20
11033911 Centrifuge system for separating cells in suspension T David Marro 2021-06-15
10384216 Centrifuge system including a control circuit that controls positive back pressure within the centrifuge core Daniel S. Sutton, T David Marro 2019-08-20
9222067 Single use centrifuge system for highly concentrated and/or turbid feeds T. David Marro 2015-12-29
8383959 Metamaterial spheric alignment mechanism — 2013-02-26
7507916 Spheric alignment mechanism — 2009-03-24
7465886 Spheric alignment mechanism entropic step down and propulsion system — 2008-12-16
6616590 Low-shear feeding system for use with centrifuges Robert B. Carr, Gary W. Brown, Sr. 2003-09-09
6416454 Control of separation performance in a centrifuge by controlling a temperature differential therein Ascher H. Shapiro, William M. Cox 2002-07-09
6095153 Vaporization of volatile materials T. David Marro 2000-08-01
5846427 Extra-lumenal crossflow plasmapheresis devices and method of use thereof Sumith Ranil Wickramasinghe 1998-12-08
5683916 Membrane affinity apparatus and purification methods related thereto Randal A. Goffe, Stephen E. Zale, James L. O'Connor 1997-11-04 $405,000
4681092 Balloon catheter wrapping apparatus George Cho 1987-07-21
4540492 Method and apparatus for treating whole blood — 1985-09-10 $2,981,000
4350593 Assembly, compositions and method for separating blood — 1982-09-21 $4,406,000
4257886 Apparatus for the separation of blood components — 1981-03-24 $2,691,000

Frequent Collaborators

T. David Marro10 shared
T David Marro2 shared
James L. O'Connor1 shared
Robert B. Carr1 shared
George Cho1 shared
Stephen E. Zale1 shared

Nearby-Ranked Inventors

Ravigopal Vennelakanti23
Amit Kaistha23
Stéphane BOUTINON23
Feras Hantash23
Philip Verhaelen23
Florian Paul Christian Binder23
Jean-Luc Bouthemy23
Egbert Lenderink23
Tony J. Branham23