Looking online, it seems that Phillipe's had three locations prior to 1001 N. Alameda.
It was started at 300 N. Alameda in 1908, moved to 246 Aliso in 1911 and then to 364 Aliso in 1918, where it stayed until construction of the Hollywood Freeway in 1951.
Here is the 346 Aliso location
The french dip was created at this location.
~Jon Paul