**7. Patents**

Whitmore, Stephen A., "Restartable Ignition Devices, Systems, and Methods Thereof," USA Provisional Patent No. US 2015/A0322892 A1, 12 November, 2015.

**Funding:** This work was partially funded with a cooperative agreemen<sup>t</sup> with the NASA Marshall Spaceflight Center, Cooperative Agreement No. NNM16AA01A.

**Acknowledgments:** The author is especially grateful for the assistance of NASA Marshall Space Flight Center (MSFC) ER-23, by graciously provided access to the testing facilities used to collect vacuum chamber data for this project. I deeply appreciate MSFC employees Kevin Pedersen, Carlos Diaz, and Daniel Cavender for their time, technical support, and expert advice.

**Conflicts of Interest:** The author declares no conflict of interest.
