Pattern enhancer

A pattern enhancer was a type of device that was associated with Transporter technology.

History
The USS Enterprise made use of pattern enhancers in 2368 where they were beamed down the surface of an unexplored M class moon of Mab-Bu VI. At the moons surface was a stranded away team and due to the interference from an approaching storm, a beam out was impossible which prompted Chief Miles O'Brien to transport down with a set of pattern enhancers which were used to safely beam the away team back to the Enterprise. 

The USS Voyager's crew in 2375 made use of the technology to break through a Borg sphere's defenses in order to transport a Transwarp coil from the vessel and onto the Voyager. Initial testing first began on the Holodeck and was later used to remove the coil from the Borg starship. 

A year later, the USS Voyager's Hazard team deployed pattern enhancers at the Scavengers base in the Forge in order to break through the transport inhibitors that were preventing a beam in or beam out from the base.