- 1895: Ogden Bolton Jr. patented the first battery-powered bicycle in the United States. This early e-bike had a top speed of about 4 mph (6.4 km/h).

- 1897: Hosea W. Libbey invented an electric bicycle with a double electric motor, one for each wheel. This design improved stability and balance.

- 1898: Mathew J. Steffens patented a rear-wheel drive electric bicycle with a rechargeable battery.

- 1899: John Schnepf patented an electric bicycle with a rear-wheel friction "roller-wheel" drive.

- Early 20th century: Electric bicycles gained popularity, especially in Europe and the United States. They were seen as a convenient and environmentally friendly mode of transportation.

- 1960s: The rise of the automobile industry led to a decline in the popularity of e-bikes.

- 1969: G.A. Wood Jr. developed the fractional horsepower motor, which would later become a key component in modern e-bikes.

- 1980s: Solar-powered e-bikes were developed, but they were not widely adopted due to limitations in battery technology.

- 1990s: Advances in technology led to the development of:
Torque sensors
Power controls
Pedal-assist technology
Nickel-metal hydride (NiMH) batteries

- 1997: A Japanese patent for a "Sensor, drive force auxiliary device ... and torque sensor zero point adjusting mechanism" was granted, further improving pedal-assist technology.

- Early 2000s: Hub motors began to be used again in the electric bicycle industry, offering improved efficiency and reliability.

- Mid-2000s: Lithium-ion (Li-ion) batteries became widely adopted, offering better performance and range.

- Present day: E-bikes continue to evolve with advancements in technology, design, and sustainability. They have become a popular mode of transportation worldwide, offering a fun, eco-friendly, and convenient way to get around.