1. "Method and Apparatus for Detecting Universally and Selectively Concentration Gradients and for Deflecting a Light Beam in a Controlled Fashion", U.S. Pat. 4,784,494 (issued November 15, 1988); 4,940,333 ((issued July 10, 1990); 4,993,832 (issued February 19, 1991); 5,153,666 (issued October 6, 1993).
2. "Apparatus and Method for Delivering Supercritical Fluids", U.S. Pat. 5,237,824 (issued August 24, 1993).
3. Apparatus for performing and universally detecting capillary isoelectric focusing without mobilization using concentration gradient imaging systems US Pat. 5,395,502 (March 7, 1995).
4. "A Device and Process for Increasing Analyte Concentration in a Sorbent" U.S. Pat. 5,496,741 (issued March 5, 1996).
5. "Process and Device for Continuous Extraction and Analysis of Fluid Using Membrane" U.S. Pat. 5,492,838 (issued February 20, 1996).
6. "Method and Device for Solid Phase Microextraction and Desorption", U.S. Pat. 5,691, 206 (issued November 25, 1997); 6,042,787 (issued March 28, 2000); 7,674,631 (March 9, 2010) and European and Japanese counterparts.
7. Electrophoresis separation in a capillary passage US Pat. 5,784,154 (issued July 21, 1998)
8. “Method and Device for Isoelectric Focusing without Carrier Ampholytes” U.S. Pat. 5,759,370 (issued June 2, 1998).
9. “Fast Sampling Device and Sampling Method for Capillary Electrophoresis” US Pat. 5,985,121 (issued Nov. 16, 1999).
10. “Needle Trap” US Pat. 6,481,301 (issued Nov. 19, 2002).
11. “Analytical devices based on diffusion boundary layer calibration and quantitative sorption” US Pat. 6,588,255 (issued July 8, 2003) and 6,941,825 (issued September 13, 2005).
12. “Measurement of fluorescence using capillary isoelectric focusing” US Pat. 6,852,206 (issued Feb. 8, 2005).
13. “Calibration procedure for investigating biological systems” US Pat. 7,232,689 (issued June 19, 2007), 8,008,064 (issued August 30, 2011), 8,080,407 (issued December 20, 2011), 8,114,660 (issued February 14, 2012),.
14. “Multiple sampling device and method for investigating biological systems” US Pat. 7,259,019 (issued August 21, 2007).
15. “Micro-devices and analytical procedures for investigation of biological systems” US Pat 7,384,794 (issued June 10, 2008) and European and Japanese counterparts.
16. “Device and method for micro sorbent extraction and desorption” US Pat 8,104,331 (issued January 31, 2012); 7,645,611 (issued January 12, 2010) and European and Japanese counterparts.
17. “Solid-phase microextraction coatings and methods for their preparation” US Pat 7,479,390 (issued December 3, 2013).
18. “Standard Analyte Generator” US Pat 9,625,426 (issued April 18, 2017).
19. “Probe for extraction of molecules of interest from a sample” US Pat 9,870,907 (issued January 16,2018).
20. “Method for measuring or identifying a component of interest in a biological system” US Pat 9,891,150 (issued February 13, 2018).
21. “System and method for desorbing and detecting an analyte sorbed on a solid phase microextraction device” US Pat 10,393,636 (issued August 27, 2019).
22. “System and method for desorbing and detecting an analyte sorbed on a solid phase microextraction device” US Pat 10,429,362 (issued 2019/10/1)
23. ''Method and instrument for extracting a component from a sample'' US Pat 10,545,073 (issued January 28, 2020).
24. ''Solid phase microextraction coating'' US Pat 10,545,077 (issued January 28, 2020).
25. "SOLID PHASE MICROEXTRACTION COATING" US Pat 16,704,426 (issued April 09, 2020).