EXHIBIT A JOINT FILING AGREEMENT

EXHIBIT A

JOINT FILING AGREEMENT

This Joint Filing Agreement (this “Agreement”) hereby confirms the agreement by and among all of the undersigned that the Schedule 13G/A to which this Agreement is attached as Exhibit A with respect to the beneficial ownership of the undersigned of shares Common Stock of Research Frontiers Incorporated is being filed on behalf of each of the undersigned. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.

Date: March 15, 2021				* Xxxxx Xxxxxxx
				XXXXX XXXXXXX
Date: March 15, 2021				* Xxxxxxxx Xxxxxxx
				XXXXXXXX XXXXXXX
				K&M XXXXXXX TRUST
Date: March 15, 2021				* Xxxxx Xxxxxxx
				By:		Xxxxx Xxxxxxx
				Title:		Trustee
Date: March 15, 2021				* Xxxxxxxx Xxxxxxx
				By:		Xxxxxxxx Xxxxxxx
				Title:		Trustee
				XXXXXXX FAMILY TRUST
Date: March 15, 2021				* Xxxx X. Xxxxxxx
				By:		Xxxx X. Xxxxxxx
				Title:		Trustee
				XXXXX XXXXXXX AND XXXX XXXXXXX
				IRREVOCABLE DESCENDANTS’ TRUST
Date: March 15, 2021				* Xxxxx Xxxxxxx
				By:		Xxxxx Xxxxxxx
				Title:		Trustee
Date: March 15, 2021				* Xxxxxxxx Xxxxxxx
				By:		Xxxxxxxx Xxxxxxx
				Title:		Trustee

*By:		/s/ Xxxxxx Xxxxxxxx
		Xxxxxx Xxxxxxxx
		Attorney-in-fact