On Infinite Series of Bessel functions of the First Kind: sum_ν J_(Nν+p)(x), sum_ν (-1)^ν J_(Nν+p)(x)

Infinite series of Bessel function of the first kind, $\sum_\nu^{\pm\infty} J_{N\nu+p}(x)$, $\sum_\nu^{\pm\infty} (-1)^\nu J_{N\nu+p}(x)$, are summed in closed form. These expressions are evaluated by engineering a Dirac comb that selects specific sequences within the Bessel series.