He was also showered with glass with shreds of it piercing his right eye, leaving it swollen and unable to open.
The clash in Blackburn, Lancs, was filmed by an onlooker who later uploaded it to YouTube.
Onlookers later claimed one of the ice cream men was offering four, two scoop cones with a flake for £2 and the other said he would do them all for 10p cheaper.
Today Ramzan, from Halifax, West Yorks, was facing jail after being found guilty of assault, possession of an offensive weapon and criminal damage.
The bust up was the climax of a bitter feud between the two men which began in March after Mr Mulla - an ice cream man for 12 years - discovered Ramzan had begun operating on his regular round in Blackburn.
It was claimed the pair had also been involved in a confrontation outside a school during which Mr Mulla allegedly told Ramzan: "This is my school - you can't come and trade here."
Then last May Mr Mulla complained to Ramzan's employers about his rival driving his ice cream van too "dangerously" by braking sharply in the street.
At 6pm on June 2, Mr Mulla was completing his round when he pulled into a street to find Ramzan - who was one a commission based deal with work - already parked up in front of him.
An eyewitness Mohammed Mobeen Yaseem said: "I heard some shouting and some swearing so I went to the window and the vans were stationary.
"The front vehicle was Mr Yummy and behind was Mr Whippy. I heard shouting and I saw the driver of the front vehicle come out. He seemed very threatening and approached Mr Whippy. He had a tyre iron - that's when I pulled the phone out and started recording.
"Mr Whippy was still in the driver's seat in the van, I didn't hear him say anything.
"Mr Yummy was kind of muffled but it was threatening and the "F" word was being used.
"The neighbours were outside and there was a child there who was being served by Mr Whippy.
"I saw a metal bar, there was something going on before I got to the window. He was at the window of Mr Whippy's van when I got to the window.
"He was obviously angry, I couldn't hear what the commotion was about but there was a lot of swearing going on. They were just parked in the middle of the road."
Mr Mulla who gave evidence from behind a screen told magistrates in Blackburn "Mr Ramzan came towards the vehicle with a metal bar.
"I haven't said anything, I did not swear or say anything - it was Ramzan swearing."
But Ramzan said: "I did not hit him with the bar at all. I showed him what I had too just too scare him. I wasn't threatening towards him."
He went to the police the day after the clash and reported that Mr Mulla had deliberately crashed into his Ford Transit van.
The court heard Mr Mulla was within his rights to operate in the area.
But as a result of the incident, the condition of the licences of the two ice cream vendors meant that they could not go within 50 metres of another vendor already trading in the vicinity as imposed by Blackburn and Darwen Licensing Committee.
Edward Harrison, prosecuting, said: "Mr Mulla says he got glass in his eyes and panicked and went forward causing the collision, this is someone who is attacked with an iron bar causing cuts to him, his windows has already been smashed.
"Glass showered over him, it is hardly surprising that he puts the vehicle in one gear and hits the defendant's vehicle at low speed. It was done out of panic and understandable in the circumstances.
"The defendant make allegations about Mr Mulla and it is all to try to blacken his name and ruin his business. He is out to cause problems for Mr Mulla and he thought he was going to get away with it.
"This defendant has absolutely no credibility, he has gone from lie to lie."
Ramzan will be sentenced on December 17 following the preparation of pre-sentence reports.
A Blackburn with Darwen Council spokesman said: 'We licence street traders. Anyone who sells goods from a stall or a vehicle in the borough needs to apply for a licence.
'We have several powers if we feel the terms of the licence has been breached including suspending it, revoking it or refusing to renew it."