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USPTO Patent Rankings Data through Dec 31, 2025
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David L. Witkewitz — 18 Patents

WJWm. Wrigley Jr.: 17 patents #23 of 442Top 6%
Bridgeview, IL: #5 of 78 inventorsTop 7%
Illinois: #4,428 of 84,256 inventorsTop 6%
Overall (All Time): #245,716 of 4,157,543Top 6%
18 Patents All Time
David L. Witkewitz has been granted 18 US patents while listed as an inventor at Wm. Wrigley Jr.. The first was granted in 1991 and the most recent in August 2010. David L. Witkewitz ranks #245,716 of 4,157,543 US inventors in our database (top 5.9%). Patent records list David L. Witkewitz in Bridgeview, IL, US.

Patents per Year

Patents granted per year, 1991 to 2010Bar chart with a peak of 5 patents in 2003.peak 51991: 2 patents19911992: 2 patents19921997: 1 patents19972000: 1 patents20002002: 2 patents20022003: 5 patents20032005: 2 patents20052006: 2 patents20062010: 1 patents2010

Issued Patents All Time

Showing 1–18 of 18 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
7767243 Combinations of cooling agents for use in confections Gordon N. McGrew 2010-08-03
7115288 Method for making coated chewing gum products with a coating including an aldehyde flavor and a dipeptide sweetener David G. Barkalow, Jonathan J. Knutsen, Chungsea Shen, Julius W. Zuehlke, Robert J. Yatka 2006-10-03 $41,030,000
7078066 Chewing gum containing physiological cooling agents and method of making Fred R. Wolf, Gordon N. McGrew, Jeffrey S. Hook, Lindell C. Richey, Mansukh M. Patel +4 more 2006-07-18 $15,131,000
6955827 Method of controlling release of antimicrobial agents in chewing gum Roman M. Barabolak, Steven E. Zibell, Michael J. Greenberg 2005-10-18 $43,862,000
6949264 Nutraceuticals or nutritional supplements and method of making Gordon N. McGrew, David G. Barkalow, Sonya S. Johnson, David W. Record, Mansukh M. Patel +21 more 2005-09-27 $45,309,000
6627234 Method of producing active agent coated chewing gum products Sonya S. Johnson, David W. Record, Michael J. Greenberg, Michael A. Reed, Victor V. Gudas +10 more 2003-09-30 $21,938,000
6627233 Chewing gum containing physiological cooling agents Fred R. Wolf, Gordon N. McGrew, Jeffrey S. Hook, Lindell C. Richey, Henry T. Tyrpin 2003-09-30 $21,938,000
6592912 Method of controlling release of antimicrobial agents from chewing gum and gum produced thereby Roman M. Barabolak, Steven E. Zibell, Michael J. Greenberg, Robert J. Yatka 2003-07-15 $27,749,000
6579545 Coated chewing gum products containing an antigas agent Daniel J. Zyck, Michael J. Greenberg, David G. Barkalow, Scott W. Marske, Philip G. Schnell +4 more 2003-06-17 $57,317,000
6541048 Coated chewing gum products containing an acid blocker and process of preparing Daniel J. Zyck, Michael J. Greenberg, David G. Barkalow, Scott W. Marske, Philip G. Schnell +1 more 2003-04-01 $55,220,000
6472000 Method of controlling release of bitterness inhibitors in chewing gum and gum produced thereby Victor V. Gudas, Michael A. Reed, Philip G. Schnell, Henry T. Tyrpin, Michael J. Greenberg +1 more 2002-10-29 $53,774,000
6444241 Caffeine coated chewing gum product and process of making Henry T. Tyrpin, Michael P. Russell, Sonya S. Johnson, Ronald L. Ream, Christine L. Corriveau 2002-09-03 $28,019,000
6165516 Method of controlling release of caffeine in chewing gum Victor V. Gudas, Michael A. Reed, Philip G. Schnell, Henry T. Tyrpin, Michael P. Russell 2000-12-26 $76,325,000
5637334 Chewing gum containing maltitol Robert J. Yatka, Lindell C. Richey, Marc A. Meyers 1997-06-10 $22,285,000
5158790 L-carvone enhanced fruit flavored chewing gum Lindell C. Richey, Sharon Thomas 1992-10-27 $20,611,000
5087458 Solubilized oleoresin black pepper, method of making same, and method of adding same to chewing gum Mansukh M. Patel 1992-02-11 $6,323,000
5075118 Method for making sugarless xylitol containing chewing gum Mario N. DiFalco, Jr. 1991-12-24 $11,408,000
4988518 Chewing gum with liquid flavor added to the rolling compound and method Mansukh M. Patel, Vasek J. Kures 1991-01-29 $10,046,000