For the Inventor, By the Inventor

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Bangor, ME, United States of America

Hallowell International, LLC

USPTO Granted Patents = 3

% Expired Patents = 66.7

Forward Citations = 21

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1 inventor (with patents filed for the assignee):

David N Shaw (3 out of 6 patents)

3 patents: Sort by Forward Citations

1. 8075283 - Oil balance system and method for compressors connected in series (2011-12-13),

2. 7651322 - Oil balance system and method for compressors connected in series (2010-01-26),

3. RE39625 - Boosted air source heat pump (2007-05-14),

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USPTO Data Jan 1 1976 - Oct 20 2026

3 Patents

#3 in Bangor, ME

#127 in Maine

#73,904 in US

Bangor, ME, United States of America

Hallowell International, LLC

Forward Citations = 21

1 inventor:

David N Shaw (3 out of 6 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hallowell International, LLC. Retrieved from https://idiyas.com/company/hallowell-international

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

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