It happened last Saturday night inside the store on the 1100 block of West Girard Avenue.
Surveillance video shows the suspect walk in and immediately start arguing with the male clerk.
Then, all of a sudden, the suspect started throwing the cash register monitors and other counter equipment at the victim.
He also threw several punches.
The attacker also appears to threaten two patrons before being pulled out of the store by two friends.
The suspect is considered dangerous.
If you see him, contact the Central Detective Division at (215)686-3093/3094 or call 911.