2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37976We review $B^+$ and $B^0$ mean lifetime measurements, including direct measurements and determination of the lifetime ratio via measurements of the ratio of branching ratios. We present world averages.Submitted to ICHEP 1994, 3 pages, LATEX, ichep.sty and 1 postscript figure included. FERMILAB-Conf-94/245High Energy Physics - Experimenttext