The 7-0 ruling came in the case of former Manchester and Bolton resident Nicholas Menditto, who had asked for his convictions to be overturned after the Legislature decriminalized possession of small amounts of pot in 2011.
"It's a topic multiple states will have to be facing," said Aaron Romano, Menditto's attorney. "Because marijuana is being decriminalized across the United States, this issue needs to be addressed."
Colorado, Washington state, Washington, D.C., and Alaska have legalized the recreational use of pot. Oregon's law legalizing it takes effect in July. Connecticut and 22 other states allow marijuana for medicinal purposes, and 18 states have decriminalized possession of varying amounts.
Last year, Colorado's second-highest court ruled that some people convicted of possessing small amounts of marijuana can ask for those convictions to be thrown out under the state law that legalized recreational marijuana. Officials in the other states are grappling with the issue.