Prior to the 1870s, there had been several inventors that had been working on inventions similar to the telephone, however, those versions never got patented. In 1871, Alexander Graham Bell began to work on the harmonic telegraph, which was a device that allowed messages to be transmitted over a wire and was the first to obtain a patent for his idea.

By 1875, Bell and his partner Thomas Watson came up with a simple receiver that could turn electricity into sound and one year later the pair made their first phone call to each other. While this technology was limited because it required an operator to manually connect calls, it was a fundamental invention of converting sound into electrical signals that laid the groundwork for future innovations.

By 1877, the Bell Telephone Company, which is known as AT&T today, was created and continued to help Bell and Watson with the development of the phone. By 1915, the first transcontinental phone call was made from New York City to San Francisco. By 1927, an E1A handset was developed in which much of the electronics were in a separate box that the transmitter-receiver handle was cradled on when it wasn’t in use.

Innovations of the telephone continued from here. In 1949, improvements to the audio quality, mechanics, and physical construction were made, and by 1963, push button versions of phones became available. As electronics and circuits were innovated, the first cordless phone was developed in 1970. This version of the cordless phone had limited mobility (up to 330 feet) because it needed to connect with a homebase that was plugged into a telephone jack.

The introduction of smartphones in the 2000s revolutionized the concept of telephones. Smartphones, the most recent innovation of the telephone, integrate a multitude of functionalities, including internet access, email, cameras, and a vast array of applications far beyond the scope of the traditional purpose of the device: voice communication.

Innovations such as touchscreens, advanced operating system, and high-speed data networks (4G and 5G) have transformed phones into powerful handheld computers. Additionally, the integration of artificial intelligence and virtual assistants has further enhanced user interaction and accessibility. The continuous innovation in telecommunications not only changed how people communicate, but also how they access information, conduct business, and engage with the world around them.

In 1876, Nicolaus August Otto invented an effective gas motor engine that he built from a motorcycle design. This engine was adopted for all liquid-fueled automobiles moving forward. At the start of the 19^th century, inventors began to branch out and various engines and electric motors were invented. In 1885, German engineer Karl Benz designed and built the world’s first practical automobile that was powered by a combustion engine and received a patent for his design. It was a three-wheel car, and his first four-wheel car was built in 1893. It has a one-cylinder (less than one horsepower) engine and could travel up to 10 miles per hour. This invention represented a significant leap from horse-drawn carriages, offering a glimpse into a future where mechanized vehicles could provide personal and efficient transportation.

Eventually, Karl Benz, Daimler Motoren Gesellschaft, and Gottlieb Daimler, inventor of the high-speed liquid petroleum fueled engine, joined together to form Benz & Cie. They eventually became best known for the Mercedes-Benz automobile brand.

By the early 1900s, gasoline cars were outselling other types of motor vehicles and there began to be a public demand to produce more. This is where Henry Ford’s assembly line for the Model T revolutionized manufacturing in 1908, making automobiles more affordable and accessible for the public. This era also saw advancements in automobile technology, such as the development of electric starters, stronger tires, improved braking systems, and enhanced safety features.

Henry’s assembly line process trimmed production time from 12.5 hours to 93 minutes. The assembly line began with a single man pulling the car down a line, as other men attached parts and pieces. Over time, an automated belt was used to move the car, and this continued to evolve.

After this, other companies and designers started to form. In 1915, C.R. Patterson & Sons of Greenfield, Ohio became history’s first African American-owned car company building cars from 1915 to 1918 until they began making buses and commercial vehicles until the Great Depression. In 1934, Chrysler Airflow models were developed but production was quickly canceled. Other automakers quickly adopted much of the innovations from the airflow model, including all-steel bodies. In 1938 the Volkswagen Beetle was launched in Germany and in 1940 the first Jeep was created.

As the century progressed, automobiles continued to be innovated to reflect changes in technology, culture, and environmental awareness. This brought about sleek designs, increased comfort, enhanced performance and innovations such as automatic transmissions, power steering, air conditioning, etc. The introduction of safety features, including seat belts, airbags, anti-lock braking, etc., improved passenger and driver safety and reduced traffic injuries and fatalities.

As the 21^st century began there were increased concerns over the environmental impact of gasoline cars as concerns about pollution and fossil fuel depletion increased. There was a shift toward environmental sustainability and technological innovation which led to the development of hybrid and electric vehicles. In 1997, the Toyota Prius was the first mass-produced hybrid car combining a gasoline engine and electric motor to reduce emissions and improve fuel efficiency. This paved the way for other manufacturers to explore alternative energy sources, leading the rise of fully electric vehicles such as the Tesla.

So, what’s next? With an increase in digital transformations such as driver-assistance systems and automatic emergency braking, innovations will revolutionize transportation by reducing human error and improve traffic efficiency. Consider technologies currently being worked on, such as self-driving cars that will use artificial intelligence, sensors, and real-time data to navigate complex road environments.