At one time this read "Foster & Kleiser Signs" and was visible from the corner of NW 4th and Flanders. Erected in 2003, The Pacific Tower apartment building now stands there.
Walter Foster and George Kleiser were outdoor advertising's original pioneers. They began doing business as Foster & Kleiser Outdoor Advertising in 1901 and were probably responsible for many of Portland's old painted signs I've illustrated in this blog. Their business grew tremendously in the 20th century, being sold and acquired several times throughout the years. It's now known as Clear Channel Outdoor, a division of giant Clear Channel Communications.