It happened inside Darling's Diner on the 1000 block of Germantown Avenue on May 5th.
Witnesses say the victim, a 49 year-old man got into an argument with an unidentified man around 8:00 p.m.
Investigators say the suspect then picked up a bottle, hit the victim over the head and ran out of the restaurant.
The victim was taken to Hahnemann Hospital with several wounds to his head.
If you have any information about this crime or this suspect, please contact: East Detective Division (215) 686-3243.