Seattle – NOVEMBER 3, 2023. TANGIBLE IP, LLC, an international patent brokerage and Intellectual Property advisory firm headquartered in Seattle, with over 5000 patents successfully brokered, announced that they brokered the sale of a HVAC air filter sensor technology patent portfolio. The identity of the buyer nor financial details of the agreement could be disclosed. This portfolio relates to devices for measuring and monitoring differential air pressure and relatively low rates of air flow through the air filter of an HVAC system. The technology also measures the degree of clogging and indicates the operational status of the air filter.

“While we are pleased to have finalized this initial transaction, we still feel confident that there is significant potential given the untapped value of this portfolio and its relevance to the industry,” said Louis Carbonneau, Founder and CEO of Tangible IP. “In a market where buyers have the luxury of being very selective, it is imperative to explore creative ways of generating proceeds for our clients.”

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Tangible IP, LLC specializes in selling high quality unencumbered patents and has now brokered the sale or license of over 5000 patent assets since its inception and has returned tens of millions of dollars back to inventors, shareholders and patent owners.

ABOUT TANGIBLE IP, LLC Tangible IP offers full service patent brokerage and strategic IP advisory services. For more info, visit or contact us via email at