Blazar variability workshop II : entering the glast era : proceedings of a workshop held at Florida International University, Miami, Florida, USA 10-12 April 2005

In an effort to exploit the full COMPTEL database of ∼9 years, we found evidence for MeV emission of several new sources, i.e. not listed in the first Comptel source catalog (Schonfelder et al. 2000). In this paper we report four of them, which we identify as blazars on the basis of their detection in the neighboring γ-ray band by EGRET. We show the combined COMPTEL and EGRET spectra of the 4 sources.