Iowans who invested in financial ventures through a now-defunct East Coast brokerage firm may be due thousands of dollars in refunds. The Iowa Securities Bureau says D-H Blair & Company of New York have created an escrow account for refunds due to complaints about unfair business practices.Craig Goettsch, Iowa’s Superintendent of Securities, says Iowans who were customers of D-H Blair between January 1, 1996 and June 30, 1998 will have to file a claim against the company and offer documentation of their trades.Goettsch says it’s unclear how many Iowans may have been unfairly lured by the company into making high-risk investments, but he thinks several dozen Iowans may have lost a significant amount of money. He says the brokerage dealt in I-P-O’s or initial public offerings.Investments typically ranged from three- to 20-thousand dollars. For more information, call the Securities Bureau at 800-351-4665.