Q: A variety of devices could be powered selectively from a single-power source carried on the body via multiple power supply signals at different frequencies, according to the patent abstract.
The patent abstract shows a number of devices using a single source.

A: yes

Q: Hoover's director reports directly to Stanford's president.
Hoover is the president of Stanford University.

A: no

Q: Castro's successful visits to Harlem and the Bronx, his speech to the United Nations General Assembly, and the October 21 march of 3,000 against U.S. policy and subsequent picket lines at Cuba's UN mission in defense of the revolution - all these events dealt blows to the U.S. government's unceasing efforts to isolate and slander Cuba.
Castro visits the UN.

A:
yes