CVR Manufacturing, Inc. was founded to do research and development of agriculture related products. CVR developed a biodegradable plastic material that is injection moldable and cheaper than plastic. For more than eleven ......CVR Manufacturing, Inc. was founded to do research and development of agriculture related products. CVR developed a biodegradable plastic material that is injection moldable and cheaper than plastic. For more than eleven years, CVR Manufacturing has supplied its customers with more than a just signs. We are a trusted provider of the Sawfish line of tree saws for skid steer loaders or tractors backed by a solid design. We also manufacture Heatsource 1 outdoor wood furnaces that are an inexpensive, hassle free heat source for your home, business, church, barn, or greenhouse. Our mission is to listen to our clients specific needs and deliver high quality products through continuous product innovation and operational excellence.