Shortly after receiving his discharge from the service of the United States Government, Coffinberry engaged in mercantile business as a partner of Messrs. Leavitt & Crane in founding a carriage and wagon axle manufactory in Cleveland, Ohio. After a time he sold out his interest in this firm and bought a fourth-interest in a small machine shop, doing business under the firm name of Robert Wallace & Co., (John F. Pankhurst and Arthur Sawtel being the company). Mr. Sawtel soon sold his interest to the company, who carried on the business for three years with considerable success. In 1869 they purchased the interests of William Bowler, Robert Cartwright and Robert Sanderson in the Globe Iron Works, Mr. John B. Cowles retaining his interest and joining the new firm. Mr. Coffinberry was chosen financial manager of this firm as he had been of the firm of Robert Wallace & Co. As this new business proved successful, the firm was soon able to purchase a half-interest in the Cleveland Dry Dock Company. Mr. George Presley, owner of the other half- interest, remained manager and Mr. Coffinberry assumed charge of the financial end of the business. The firm as thus constituted engaged in the construction of wooden ships. Mr. Coffinberry soon became convinced of the utility of building iron and steel vessels. After a thorough investigation of the subject, taking into his counsel such veteran owners of lake craft as Capt. William Pringle, George W. Jones, J. W. Nicholas, Philip Minch and C. E. King., Coffinberry defined a new type of vessel for service on the
Great Lakes. These gentlemen also conveyed their conclusions to
Gen. O. M. Poe, United States engineer, who then designed the
locks at the
Sault Ste. Marie to allow passage of vessels with 300 to 600 feet keels. Thus it was that Mr. Coffinberry, and these gentlemen became the pioneers of the modern
lake freighter. After founding the plant and laying the keel of the iron steamer
Onoko, the firm was incorporated under the name of the Globe Ship Building Company, of which Mr. Coffinberry was chosen president and financial manager. After continuing business under these papers of incorporation, and building many iron and steel vessels, a difference arose between the old partners, and Messrs. Coffinberry, Wallace and Cowles sought to purchase the interest of Mr. Pankhurst. Failing in this, they sold their interests to Mr.
M. A. Hanna. In the summer of 1886, Messrs. H. D. Coffinberry and Robert Wallace, with the assistance of a few of the enterprising vessel owners of Cleveland, purchased the plant of the old Cuyahoga Furnace Company. They increased the plant's capacity for general machine and foundry work, by building a large brick machine shop, a top story fronting on the viaduct, which contained the offices, and a brick boiler shop. They also built an extensive shipbuilding plant on the river front, capable of building four of the largest vessels per annum. They then announced themselves as ready for the construction of modern lake vessels. This company was incorporated as the Cleveland Shipbuilding Company in 1888 and later became the
American Ship Building Company. Mr. Coffinberry was chosen president and financial manager; Mr. Wallace, vice-president and general superintendent; William M. Fitch, secretary, and James Wallace, designing engineer. Orders soon encouraged this new enterprise, and the company then decided to build a large dry dock, which was done and incorporated as the Ship Owners Dry Dock. This dock was large enough to receive the largest hulls then on the lakes; however it proved inadequate to accommodate the extensive demands made upon it, and a smaller dock, was sunk alongside of it. Mr. George Quayle was manager of these docks. This company also purchased the wooden shipyards of William Radcliffe, and was thus able to construct wooden vessels. After seeing these great results grow from small beginnings, and being content with the profits accruing, in 1893 Mr. Coffinberry retired to his home at Clifton Park, which was surrounded by a natural growth of forest trees, and overlooked
Lake Erie. After Mr. Coffinberry's retirement, the Ship Owner's Dry Dock Co. was acquired by the Globe Shipbuilding Company in 1897. Eventually (1899) Globe Shipbuilding Company, Ship Owner's Dry Dock Company and Cleveland Ship Building Company were consolidated under the name
American Ship Building Company. This was after
M. A. Hanna acquired controlling interest in the companies. Henry D. Coffinberry was also a member of the first board of five commissioners of Cleveland, a director of the State Bank and a member of the Board of Industry of Cleveland. He owned large interests in several of the best vessels on the lakes and much valuable suburban real estate, and considerable mineral land in the West. He was chosen a delegate to the National Democratic Convention on the gold platform in 1896. He was one of the citizen members appointed by the common pleas judges to assist county commissioners in building new county buildings. ==Family==