Franz Bakery
History
History
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[thumb\|right\|300px\|A delivery wagon painted to look like the wagons at Williams' Bakery](/wiki/File:Williams_Bakery_Delivery_Wagon.jpg "Williams Bakery Delivery Wagon.jpg")
[thumb\|right\|A Franz Bakery truck in Seattle](/wiki/Image:Franz_Delivery_Truck.JPG "Franz Delivery Truck.JPG")
In collaboration with Engelbert Franz of Franz Bakery, W.P. Yaw of [Yaw's Top Notch Restaurant](/wiki/Yaw%27s_Top_Notch_Restaurant "Yaw's Top Notch Restaurant") invented the  diameter [hamburger](/wiki/Hamburger "Hamburger") bun in the late 1920s. Though others are credited with creating a bread product to use for the first hamburgers known to the world, Franz is credited for inventing the hamburger bun in its current worldwide accepted form.


In what decade did W.P. Yaw and Engelbert Franz invent the hamburger bun?