Scott -
Actually Fred's first bow quiver was a one arrow hand-held affair... the back of Fred's bow was lightly notched above the leather grip and Fred held the arrow in place against the back of the bow while he was gripping the leather handle of the bow. The limbs of the bow bent back toward Fred, so did not interfere the position of arrow.
Fred didn't really invent that simple "hand-held" method. Actually native American Indians used that method centuries before Fred's birth. I'm sure the same method was used by other developing stone age cultures around the world as they progressed.
The hand-held leather quiver that somewhat resembles your quiver pictured in your post above, was the prototype of the quiver that Fred patented. I am not aware of any evidence that more than one of these hand-held leather quivers was ever made by Fred. Nor am I aware of any evidence that it was ever marketed.
Fred's early use of the bow quiver is clearly documented in this second film "Moose Diary" (which is not part of the Bear CD Library). I showed "Moose Diary" at Compton a couple of years ago. That film combines footage of Fred's 1944 and 1945 Canadian deer and moose hunts with KK Knickerbocker.
The 1944 footage shows them using the rare hair on Northwoods back quivers. The 1945 footage shows them with bow quivers on their Grumley bows. Fred shot his first moose on the 1945 hunt.
Interestingly Fred applied for his bow quiver patent on January 16, 1946, just a few months after returning from that first successful Canadian moose hunt.
Incidentally the US Patent Office did not grant that patent to Fred until March 8, 1949. A full three years and two months after his application. This delay indicates that something was amiss, but that is another lengthy discussion for another time, and perhaps another thread. Simply stated, it is unusual that Fred's 1946 application took more than 3 years to be granted. At that point in time, most patents were granted in far less time.
Being a US patent holder myself, and a 34 year employee of AT&T and Bell Labs which averaged more than one patent per day, everyday for more than a 100-year period. Since the turn of the century, there have been several top companies that are averaging more than 10 patents per day in a single year. I have long been interested in patents and the history of the patent process.