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I have successfully represented the following companies involving a wide array of patent law issues, including patent drafting and prosecution, as well as with Inter Partes Review at the US Patent Office and patent litigation in District Court:


Recent Results

US9,148,480 - ON24 asserted this patent against by filing an infringement action in Northern California District Court. Not happy with the performance of their previous patent law firm, retained my firm to take over the defense. I drafted a motion for summary judgement asserting the patent is invalid for being indefinite under 35 U.S.C. § 112(6), 112(2). During the hearing I made oral arguments in support of the briefs. The Judge granted the motion and invalidated the entire patent:



US8,398,037 - Really Right Stuff (RRS) asserted this patent against Leofoto products by canceling multiple Amazon listings. After Leofoto retained my firm to perform a prior art search, I worked closely with the client to identify multiple highly relevant publications which led to the filing of an Inter Partes Review at the USPTO.  The IPR petition has been filed and a filing date has been accorded:




US6,773,172, US10,585,337, US10,612,718 - Really Right Stuff (RRS) asserted these patents against Field Optics Research (FOR) by filing an Infringement action in Utah Federal District Court. I joined the FOR defense team and filed amended contentions to add multiple non-infringement and invalidity arguments. The motion to amend was granted, the previously filed claim construction briefs were vacated, and the Court ordered new briefs be filed before the claim construction hearing. New claim construction brief and motion for partial summary judgement filed. Response claim construction brief filed. Reply to Plaintiff's response to motion for summary judgement filed. Reply claim construction brief filed.

Client Testimonials

John Desmond, Desmond Photographic: "Mr. Sheerin has a deep knowledge of patent issues. Very thorough prior art investigation. A great advocate for anyone involved in a patent dispute."

Vince Warner, Field Optics Research: "Once I added Mr. Sheerin to my defense team, he elevated my case from a C+ to A+ almost immediately."

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