  In this paper we propose a way to construct classical type Sobolev orthogonal
polynomials. We consider two families of hypergeometric polynomials: ${}_2
F_2(-n,1;q,r;x)$ and ${}_3 F_2(-n,n-1+a+b,1;a,c;x)$ ($a,b,c,q,r>0$,
$n=0,1,...$), which generalize Laguerre and Jacobi polynomials, respectively.
These polynomials satisfy higher-order differential equations of the following
form: $L y + \lambda_n D y = 0$, where $L,D$ are linear differential operators
with polynomial coefficients not depending on $n$. For positive integer values
of the parameters $r,c$ these polynomials are Sobolev orthogonal polynomials
with some explicitly given measures. Some basic properties of these
polynomials, including recurrence relations, are obtained.
