Some miscellaneous White European inventions, not in any particualr order of importance:
- Mathematics
- Telescope
- Aircraft
- Spacecraft
- Space station
- Transistor
- Logic gates
- Computer
- Programming languages C/C++
- Computer operating systems
- Television
- Radar
- Radio
- Telephone
- Maser, Laser
- Piston engine
- Direct current, Alternating current
- Electric motor
- Automobile
- Turbine
- Nuclear power

Not to mention the great contributions to arts, music, philosophy and culture in general. What did negroes invent? Peanutbutter and the doorknob? Does there exist a single pure full-fledged black african negro inventor, the likes of, say, Nicola Tesla or a mathematician the likes of Leonhard Euler? If so, could anybody give me a link or a name of a book where I could read about it?

I don't know where the doorknob thing started, as it requires a door. Something a mud hut doesnt need. Ive been to the Metroplitan Museum of Art, they have a recreation of an old manor from circa 17th century, and those doors had knobs. Peanut Butter was invented by Dr. John Harvey Kellogg(yes, the cereal guy) patented a "Process of Preparing Nut Meal" in 1895 and used peanuts. Kellog served the patients at his Battle Creek Sanitarium peanut butter. Joseph Lambert worked for Dr. Kellogg and began selling his own hand-operated peanut butter grinder in 1896. Almeeta Lambert published the first nut cookbook, "The Complete Guide to Nut Cookery" in 1899.

The Sumerians had a mathematics system, while ours uses ten as an increment, they used 60(this still lives on in our time system, 60 seconds=1 minute, 60 minutes = 1 hour). Technically we cant lay sole claim to mathematics, though we did invent our own processes and improve on others.