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  • Zimmerman, P., U.S. Patent 7457758, “Method and apparatus for generating standardized carbon emission reduction credits,” U.S. Patent and Trademark Office, November 25, 2008.

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  • Zimmerman, P., U.S. Patent US20170013802A1;l US8307785B2 “Modular livestock feed system for measuring animal intake and monitoring animal health ,” U.S. Patent and Trademark Office, July 26, 2019.

  • Zimmerman, P., Zimmerman, S. U.S. Patent US10085419 “Modular livestock feed system for measuring animal intake and monitoring animal health ,” U.S. Patent and Trademark Office, October 2, 2018

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  • Zimmerman, P., New Zealand Patent 27, "Apparatus for measuring methane and carbon dioxide levels in a ruminant's breath and providing supplements accordingly," New Zealand Patent Office, May 23, 2013

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  • Zimmerman, P., Great Britain Patent 2291072, "Method and system for monitoring and reducing ruminant methane production," Great Britain Patent Office, July 31, 2013

  • Zimmerman, P., Sweden Patent 2291072, "Method and system for monitoring and reducing ruminant methane production," Swedish Patent Office, July 31, 2013

  • Zimmerman, P., European Patent 2291072, "Method and system for monitoring and reducing ruminant methane production," European Patent Office, July 31, 2013

  • Zimmerman, P., Zimmerman, S., Ireland Patent 2558855, "Method and system for monitoring and reducing ruminant methane production," Intellectual Property office of Ireland, October 8, 2014

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  • Zimmerman, P., Zimmerman, S., Great Britain Patent 2558855, "Method and system for monitoring and reducing ruminant methane production," October 8, 2014

  • Zimmerman, P., Zimmerman, S., European Patent 2558855, "Method and system for monitoring and reducing ruminant methane production," October 8, 2014

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  • Zimmerman, P., Zimmerman, S., Germany Patent 2558855, "Method and system for monitoring and reducing ruminant methane production," October 8, 2014

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  • Zimmerman, P., Zimmerman, S., Sweden Patent 2558855, "Method and system for monitoring and reducing ruminant methane production," October 8, 2014

  • Zimmerman, P., France Patent 2709442, "Vaccine and health-related applications for ruminant breath monitoring system," March 4, 2015

  • Zimmerman, P., Sweden Patent 2709442, "Vaccine and health-related applications for ruminant breath monitoring system," March 4, 2015

  • Zimmerman, P., Netherlands Patent 2709442, "Vaccine and health-related applications for ruminant breath monitoring system," March 4, 2015

  • Zimmerman, P., European Patent 2709442, "Vaccine and health-related applications for ruminant breath monitoring system," March 4, 2015

  • Zimmerman, P., Great Britain Patent 2709442, "Vaccine and health-related applications for ruminant breath monitoring system," March 4, 2015

  • Zimmerman, P., Denmark Patent 602012005725.40, "Vaccine and health-related applications for ruminant breath monitoring system," March 4, 2015