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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.
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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
- Zimmerman, P., Denmark Patent 602009017658.70, "Method and system for monitoring and reducing ruminant methane production," Danish Patent Office, July 31, 2013
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- Zimmerman, P., Netherlands Patent 2291072, "Method and system for monitoring and reducing ruminant methane production," Netherlands Patent Office, July 31, 2013
- 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
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- Zimmerman, P., Zimmerman, S., China Patent 2558855, "Method and system for monitoring and reducing ruminant methane production," October 8, 2014
- Zimmerman, P., Zimmerman, S., Netherlands Patent 2558855, "Method and system for monitoring and reducing ruminant methane production," October 8, 2014
- 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
- Zimmerman, P., Zimmerman, S., Denmark Patent 2558855, "Method and system for monitoring and reducing ruminant methane production," October 8, 2014
- Zimmerman, P., Zimmerman, S., Germany Patent 2558855, "Method and system for monitoring and reducing ruminant methane production," October 8, 2014
- Zimmerman, P., Zimmerman, S., France Patent 2558855, "Method and system for monitoring and reducing ruminant methane production," October 8, 2014
- Zimmerman, P., Zimmerman, S., Finland Patent 2558855, "Method and system for monitoring and reducing ruminant methane production," October 8, 2014
- Zimmerman, P., Zimmerman, S., Sweden Patent 2558855, "Method and system for monitoring and reducing ruminant methane production," October 8, 2014
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Zimmerman, P., Zimmerman, S., Brazil Patent 11 2012 026452-4, "Method and system for monitoring and reducing ruminant methane production," June 19th 2020
- 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
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