I thought that you had a winner of a wiener (wiener is the correct German spelling) idea there Dingo, so I did a quick patent search and discovered that Dr. Wernher Magnus Maximilian Freiherr von Braun, Jr. patented a spray on condom in 1973.
Wernher Jr. was the son of Dr. Wernher Magnus Maximilian Freiherr von Braun , Sr. You may recall that the senior von Braun was the German scientist who led their rocket development program throughout World War II, and who later was secretly brought to the United States by the American government through the top secret program originally known as Operation Overcast, later known as Operation Paperclip.
Young Wernher's invention was called the "Version Two Pocket Sprayer," also known under it's abbreviated name, which because of a typographical error in the patent application substituting an "R" for the "P" in Pocket, became the "V-2 Rocket."
He's pictured here with the spay can, which came with an attachable cord allowing it to be worn around the neck, or elsewhere for the appropriately endowed. The woman in the picture was his secretary, Helga Fannykuchen, inventor of the plastic watch crystal protector she is wearing, which was also doubled patented as an IUD. Helga later returned to Germany and married Dr. Hans Klum and had a daughter, Heidi. Helga became a multi-millionaire off the royalties from her invention, having licensed it to both Swatch and Paragard.
Also, as an aside, it was Dr. Wernher Magnus Maximilian Freiherr von Braun, Jr. and Helga Fannykuchen who are credited with being the first to have had their passport photos taken in the nude, some years before John Lennon and Yoko Ono unsuccessfully attempt to do the same with their passports. Dr. von Braun, Jr. and Helga were famous, or infamous, depending on one's view, for submitting nude pictures of themselves displaying their inventions to fulfill that part of patent application requiring a photograph of the invention. This picture comes from the actual patent application for the V-2 Rocket (Note: The actual picture wasn't pixelated to obscure the Dr's private parts).
Von Braun Jr.'s spraying process seems to be different from yours, having only one nozzle and does not involve inserting the penis into a can, so we may be able to get a patent on your multiple nozzle and can insertion method. Marketing your product, which requires that the man insert his penis in the can for spray application might be difficult, but I did read a study of San Francisco residents reflecting that five out of six men preferred inserting their penis into the can, so maybe there is a hole population of men already interested in your product.