Jack Jumper Patent

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I am looking for the makers NAME, PATENT NUMBER AND DATE of this commercially manufactured red Jack Jumper ski sled ???
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Answer: The sled was Manufactured be the C. W. Pritchard Co. Adams Mass, BUT I think the patent holder is actually W. F. CLARK & P. T. PEERAUI.T, Patented August 30, 1904, Patent No. 768,977 (see attachment).
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Jack Jumping, also known as Skibock in Europe, is a winter sport activity that involves descending down a snowy slope on a Jackjumper. The sled is a very compact skiing device that consists of a small bench seat attached to a single runner ski, the earliest ones utilizing barrel staves for the ski. The seat is usually mounted to the ski using a solid wooden post, BUT sometimes a spring and/or shock absorbing device is employed. The origins of Jack Jumping, as well as its name, remain a mystery, BUT its thought to have originated in New England during the late 1800s.
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References:
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This snow transportation article briefly mentions the New England history and construction of a Jack Jumper:
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A Single-Runner Coaster, from the article: The Practical Boy: Ice-boats, Snow-shoes, Skate-sails, Sleds, etc. by Joseph Henry Adams, edited by Mary Mapes Dodge, St. Nicholas, Volume 32, Number 3, January 1905, pages 249 to 253 (see attachment).
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After posting this item I came across the attached Popular Mecannic article mentioning a patent being filed for a similar Jack Jumper sled. I suspect this story is making reference to a patent filed by W. J. Roach for a "collapsible" version on Nov 10, 1914, patent # 1,116,487 called a Coaster Sled (see attachment). The collapsible version of the sled, with foot pegs, makes more sense to me. I did a lot of patent research to hopefully provide the correct information and good vintage images for this webpage.
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Single-Runner Sled is a Coasting Novelty, January 1915, page 169, from Popular Mecannic.
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KeyWords: Single runner coaster, Skibock, Ski bock, Coaster sled, Jack Adams, Jack Jumper, Jack Jumping, bump jumper, Skip Jumper, snow bike, snow scooters, Vermont skipper, sit or paret ski, Manigod: la Croix-Fry and Merdassier, tandems, primitive, antique, logger recreation, old, engineering, seat, bench, wood, steel, mid to late 1800's, stave, band, single runner, double, similar to slalom skiing, race, racing, downhill, alpine, kids toy, snow sled, wax, my jack jumper is painted red with white trim, Another Skip Jumper was manufactured by K. O. Chamberlin & Co. in Jericho, Vermont.