Mayo Laboratories Inc. Mayolian B-Supply Get a print! $8.00 Add to Cart Product Information: Model:Mayolian B-Supply Manufacturer:Mayo Laboratories Inc. Schematic Pages Page 1 Schematics Content Page 1: GENERAL RADIO COMPANY JEFFERSON ELECTRIC MFG. COMPANY MAYO LABORATORIES INC. Please note: we carry a wide range of products which will fulfill the specifications above. Please use our search function or browse our products to find what you need!