There are three building permits for 8433 Sunset from 1940, all listing the owner as W R Wilkerson:
August 19th - "Enlarging present cafe to make more storage and kitchen space."
September 4th - "Add third floor to existing bldg, install new fire escape."
September 10th - "
Enlarging present cafe to make kitchen & storage space - supplementary valuation No increase in size. Add partition."
BTW. The 1940 CD lists 8433 Sunset under 'Restaurants and Lunch Rooms' as "Knew & La Maze".