No it is rubbish!
There are several places that build tandem bicycles, from small custom shops in basically any country, to factories usually in Asia.
That's like asking how safe are minivans. A well built, well maintained and sensibly used tandem bike don't come with any special risks. Ride it like a fool, ignore the upkeep, and a tandem - just like any vehicle - can bea death trap.
Tandem Trunk is a trunk circuit which connects a tandem switch to another tandem switch or to a telephone company central office.
Tandem Computers was created in 1974.
Tandem Productions ended in 1986.
Tandem Productions was created in 1958.
Tandem Aero was created in 1998.
Tandem Verlag was created in 1994.
The Tagalog term for tandem is "samahan" or "magkasama".
One in front of the other
We drove the horses tandem. (One behind another) We saw pictures of tandem bicycles.