As motorcycles grew more popular in the early 20th century, Russian inventor Frank Marcovsky designed a suit of armor to protect riders:

The suit in its entirety comprises a one-piece garment, having the body, legs and arms, and a detachable helmet or head piece, each of such portions being provided with inflatable cushioning elements adapted to be filled with compressed air, for the purpose of protecting the wearer from shocks or blows incidental to accidents or the use to which the armor is put.

The inflatable ribs can be filled at an air pump, forming a protective cushion that leaves the rider the full use of his limbs. “All exposed portions of the body of the wearer are amply protected against severe shocks of impact or blows incidental to accidental contact with the ground, other riders, fences, etc.” The patent was granted in 1915; I don’t know how it fared.

WD-40 has never been patented. The ingredients are a trade secret.

Royce Husted’s “power-driven ski,” patented in 1976, adds a motor-driven belt to conventional skis to create, in effect, a standing snowmobile:

Applicant’s invention provides the skier on the one hand with some of the challenges, such as holding balance, etc., of downhill skiiing without the dependency on hilly terrain and ski lifts, and on the other hand it is much less cumbersome to use, to transport and to store than the snowmobile, and less expensive to produce and maintain.

This would make February commutes so much easier …

Philadelphia inventor Jones Wister conceived a curious weapon in 1916:

One object of the invention is to so construct a fire arm that it can be used in a trench with the aid of a periscope without exposing the soldier to the fire of the enemy. This object I attain by curving the outer end of the barrel so as to deflect the projectile in a direction at an angle to the longitudinal line of the fire arm.

Germany experimented with a similar design during World War II and found that the barrel gave out very quickly under the enormous stress; the bullets sometimes shattered. Wister had envisioned that the same principle might be used with machine guns and even cannon — let’s hope he didn’t try that out.

E.S. Williamson’s “spring lift for stoopers,” patented in 1922, was essentially a stiff spring that a laborer could mount on his back “so that when the wearer bends over or stoops this spring body member is flexed and exerts a tendency to support and balance the bent-over portion of the body, whereby the muscles ordinarily brought into play to balance and support the body in such position need not be fully exercised and can rest.”

The wearer can sit or kneel normally, and there’s even an attachment to help bear the weight of a shovel during heavy work. “Thus it will be seen that a workman equipped with my device will not tire as easily and can do more work more comfortably and easily.”

https://www.youtube.com/watch?v=vpl-Pj6sWmI

Siren Elise Wilhelmsen taught a clock to knit a scarf. The mechanism’s progress is reflected on its face, which functions as a 24-hour clock; it adds one stitch per hour and one segment per day, producing a wearable two-meter scarf in a year.

“What I wanted to show was the nature of time in a different way,” the Norwegian designer says. The clock does this in three ways: The unknitted skein represents time to come, the clock itself displays the current time, and the finished scarf represents time past.

Montana inventor William Beeson offered the swimming apparatus above in 1881 — a suit fitted with a membrane that “acts like wings or fins, which, from the movement of the legs and arms effect a propulsion through the water.”

In 1910 O.B. Lyons patented the “life preserver and swimming machine” below — just turn the handle to drive the propeller.

Presumably you could combine the two to go twice as fast.

James D. Williams’ “animal ear protectors,” patented in 1980, provide “a device for protecting the ears of animals, especially long-haired dogs, from becoming soiled by the animal’s food while the animal is eating.” The ears are protected by plastic tubes that are held to the animal’s head by adjustable straps.

The invention “may be itself decorated so as to enhance the appearance of the animal in the eyes of its owner and of others.” What that looks like is left to the imagination.