Christopher Hand — 6 Patents at Tula Etechnology

Christopher Hand has been granted 6 US patents while listed as an inventor at Tula Etechnology. The first was granted in 2014 and the most recent in November 2025. Christopher Hand ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list Christopher Hand in San Jose, CA, US.

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #	Title	Co-Inventors	Date
12474139	Gas powered semi-automatic airgun action	Jeffrey D. Hanson, David W. Snyder	2025-11-18
11709032	Gas powered semi-automatic airgun action	Jeffrey D. Hanson, David C. Snyder	2023-07-25
11378352	Gas powered semi-automatic airgun action	Jeffrey D. Hanson, David C. Snyder	2022-07-05
9982611	Internal combustion engine control for improved fuel efficiency	Adya S. Tripathi, Chester J. Silvestri, Christopher W. Chandler, Joshua P. Switkes, Mark A. Wilcutts +1 more	2018-05-29
9664130	Using cylinder firing history for combustion control in a skip fire engine	Mark A. Wilcutts, Xin Yuan, Joshua P. Switkes, Li-Chun CHIEN, Steven E. Carlson +3 more	2017-05-30
8651091	Skip fire engine control	Adya S. Tripathi, Christopher W. Chandler, Joshua P. Switkes, Mark A. Wilcutts, Matthew A. Younkins	2014-02-18

Christopher Hand — 6 Patents

Issued Patents All Time

Patent Widget