John Hopps invented the first cardiac pacemaker.
Have you ever wondered, "who invented the circular thing that keeps the pizza from hitting the inside of the box top?"
A pager is a dedicated RF (radio frequency) device.
A competitor to the linotype machine was the Mark Twain funded paige typesetter.
The history and invention of Paintball.
The paint roller was invented by Norman Breakey of Toronto in 1940.
In 1959, Glen Raven Mills of North Carolina introduced pantyhose.
The history of paper, papermaking and paper sacks; the patents and persons behind the different processes.
A history of the paperclip.
History of the paper punch.
Who invented paper towels and other kitchen innovations.
Louis Sebastien Lenormand is credited with being the first person to demonstrate the principle of the parachute in 1783.
Carl Magee invented the first parking meter in 1932.
The history of particle accelerators.
French scientist and mathematician, Blaise Pascal invented the first digital calculator - the Pascaline.
The history of pasta.
Louis Pasteur invented pasteurization.
The first patent issued for a medicine was granted in 1796.
Elon Musk invented Paypal a money transfer service.
Kary Mullis received a patent for PCR, the process for amplifying nucleic acids.
Learn about PCS technology (Personal Communication Services) or digital cellular phones.
The history of peanut butter.
The history of the drug penicillin and how it works. Penicillin was discovered by Alexander Fleming. Andrew Moyer patented the industrial production of penicillin. John Sheehan invented a synthesis of natural penicillin.
The history of pens and other writing instruments (including pencil sharpeners and erasers).
Donalee Tabern and Ernest Volwiler co-invented the general anesthetic, Pentothal.
"Pepsi-Cola" was invented by Caleb Bradham in 1898.
The history behind perfume.
The history of the periodic table.
The history of the periscope.
The USPTO will not patent a perpetual motion machine.
Edith Flanigen received a patent for a petroleum refining method, and was one of the most inventive chemists of all time.
Don't forget someone had to have invented the Pez dispenser - smile and enjoy.
The Phillips head screw was the brainchild of Henry Phillips. He invented the new screw to work better with power screwdrivers.
Randice-Lisa Altschul invented the world's first disposable cell phone.
The word "phonograph" was Edison's tradename for his musical playback device, which played wax cylinders rather than flat disks.
The photocopier was invented by Chester Carlson.
Learn about the Camera Obscura, the history of photography, the significant processes, polaroid photography and the invention of photographic film. See Also - Photography Timeline
Photoluminescence spectroscopy is a contactless, nondestructive method of probing the electronic structure of materials.
Alexander Graham Bell's photophone - ahead of its time.
Louis Moyroud and Rene Higonnet invented the first practical phototypesetting machine.
Solar cells or PV cells rely on the photovoltaic effect to absorb the energy of the sun and cause current to flow between two oppositely charge layers. See Also - How a Photovoltic Cell Works
, Making N and P Material for a Photovoltic Cell
The piano first known as the pianoforte was invented by Bartolomeo Cristofori.
The piggy bank's origin owes more to the history of language.
The patents and people behind the first oral contraceptives.
On October, 1965, Pillsbury debuted the loveable 14-ounce, 8 3/4-inch character in a Crescent Roll commercial.
The history of pinball.
The history of pizza.
Learn about the history of plastic, the uses for and the making of plastic, plastic in the fifties and more.
Noah McVicker and Joseph McVicker invented Play-Doh in 1956.
Simple pliers are an ancient invention. Two sticks probably served as the first uncertain holders, but bronze bars may have replaced wooden tongs as early as 3000 BC.
The farmers of George Washington's day had no better tools than had the farmers of Julius Caesar
's day - in fact - Roman ploughs were superior to those in general use in America eighteen centuries later.
John Deere invented the self-polishing cast steel plow.
Learn about ancient and modern plumbing from around the world - bathes, toilets, water closets.
A pneumatic device is any of various tools and instruments that generate and utilize compressed air.
Legend and history of the jumping toy.
Polaroid photography was invented by Edwin Land.
The methods and techniques of, and the equipment available to, police agencies.
History of the polio vaccine and biography of polio researcher Jonas Salk.
Polyethylene terephthalate created synthetic fibers such as polyester dacron and terylene.
John Larson invented the polygraph or lie detector in 1921.
Polystyrene is a strong plastic created from erethylene and benzine that can be injected, extruded or blow molded, making it a very useful and versatile manufacturing material.
Polyurethane is an organic polymer that can be injected, extruded, or blow molded; making it a very useful and versatile manufacturing material.
Pompoms and the history of cheerleading innovations.
The history of the popsicle.