Patents
Patents filed since that cite Meyer's. Most are other people's work, and an examiner chose many of them during prosecution rather than the applicant volunteering them.
Citation index — what each of Meyer’s filings cites, and every later patent citing it.
3 patents held by Petrolfree Inc
2014 · 1
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US8720389B2
Method and apparatus for controlling an electric motor and an internal combustion engine
United States · Zachary A. Henry, SR. · Ricky L. Gammons · 13 May 2014 · indexed, no text held
2012 · 1
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US8141523B2
Method and apparatus for controlling an electric motor
United States · Ricky L. Gammons · Zachary A. Henry, SR. · 27 Mar 2012 · indexed, no text held
2010 · 1
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US20100051449A1
Method and apparatus for controlling an electric motor
United States · Ricky L. Gammons · Zachary A. Henry, SR. · 4 Mar 2010