Superior Court Judge Julia L. Aurigemma, sitting on the complex litigation docket in Middletown, has granted class certification in a case in which more than 100 Pratt & Whitney employees say they were caught in a squeeze between the company and a labor union.

The 100 to 150 employees are former salaried Pratt workers who were told in 1992 and 1993 to choose between being laid off or going “back to the clock,” by being demoted to hourly positions.