I can't provide you with the most up-to-date list of welding hose manufacturers. However, I can mention some well-known companies that were involved in manufacturing welding hoses at that time. Keep in mind that the status of these manufacturers may have changed, new companies may have emerged, or some of these companies might no longer be in operation. It's recommended to do a current online search to find the most current information. Here are a few manufacturers that were known for producing welding hoses:

Harris Products Group: A well-known manufacturer welding hose manufacturers of gas welding and cutting equipment, including welding hoses.

Goodyear Rubber Products, Inc.: This company produces a variety of industrial rubber products, including welding hoses.

Parker Hannifin: Parker offers a range of industrial hoses, including those suitable for welding applications.

Continental AG: Continental is a global company that produces various rubber and plastic products, including hoses for welding and other industrial applications.

Twin City Hose, Inc.: They specialize in flexible metal hoses, including hoses used in welding and other industrial processes