Are you protected? – Light-fingered opportunists could make a mint from your efforts. Take a look at the gallery for both recent and historical examples of famous ideas which, according to some, weren't always given credit where it was due.
Two bites at the Apple – Tech giant founded by the late Steve Jobs acknowledge their iPod design was influenced by the work of British inventor Kane Kramer.
Best of enemies – The Winklevoss brothers recently admitted defeat in their efforts to prove Facebook founder and Harvard associate Mark Zuckerberg appropriated their ideas for the social network.
Stealing Nemo? – French children's author Franck Le Calvez sued Walt Disney, believing the clownfish character was based on his creation.
Shedding light on the case – Gordon Gould was instrumental in the invention of the laser and spent decades pursuing the U.S. government for appropriating the design.
Longstanding feud – The telescope's invention is commonly credited to Galileo, but Dutch eyeglass maker Hans Lippershey applied for a patent in 1608.
Left ringing – Alexander Graham Bell is the nominal inventor of the telephone in 1876, but his contemporary Elisha Gray swore the design was his.
An early model – The "Marconi" radio pictured in 1913, named after the Italian Guglielmo.
Rightfully restored – But the invention belonged to legendary scientist Nikola Tesla, and the patent was restored to him after his death.