# How the First Home Video Game Console Worked > Ralph Baer's 1969 patent for the Magnavox Odyssey, the first home video game system, which generated controllable dots on a standard television screen using analog circuitry. - **Patent:** US 3659285 - **Original title:** Television gaming apparatus and method - **Owner:** Sanders Associates Inc - **Granted:** 1972 - **Status:** Public domain (expired) - **Times cited:** 44 - **Field:** consumer_electronics, gaming, mechanical ## What it does The patent describes an analog electronic system that connects to a standard television's antenna terminals to display interactive games. It generates three main visual elements: two 'hitting' symbols (controlled by players) and one 'hit' symbol (a ball). The system uses horizontal and vertical sync generators to create square pulses. By delaying these pulses using voltage controls, the system positions the symbols on the screen. A critical component is the coincidence circuit, which detects when a player's hitting symbol overlaps with the ball symbol. When this overlap occurs, the circuitry automatically reverses the ball's direction, simulating a bounce in games like table tennis or volleyball. ## What it does NOT cover - Does not cover digital game systems that use microprocessors, software code, or pixel framebuffers to render graphics. - Does not cover games that display complex, multi-colored sprite graphics instead of simple geometric dots or blocks. - Does not cover systems that require a specialized computer monitor rather than a standard broadcast television receiver. - Does not cover collision detection calculated via software coordinate checks rather than analog hardware coincidence gating. ## The clever bit Instead of using expensive computers to draw graphics, the system exploits the television's own electron beam scanning cycle. By delaying simple electrical pulses relative to the TV's sync signals, it tricks the television into drawing movable boxes at precise screen coordinates using cheap, analog components. ## Real-world examples 1. The Magnavox Odyssey home video game console (1972) 2. The 'Brown Box' prototype developed by Ralph Baer at Sanders Associates 3. Early analog table tennis arcade machines like Atari's Pong ## Why it matters This patent is the foundational legal document of the video game industry. It protected the technology behind the Magnavox Odyssey, the world's first commercial home video game console. Magnavox and Sanders Associates successfully used this patent in lawsuits against Atari, Coleco, and Nintendo, securing over one hundred million dollars in licensing fees and establishing the legal boundaries of interactive television software. ## Frequently asked questions ### What does How the First Home Video Game Console Worked cover? Ralph Baer's 1969 patent for the Magnavox Odyssey, the first home video game system, which generated controllable dots on a standard television screen using analog circuitry. ### Who owns patent US 3659285? Sanders Associates Inc owns this patent, granted in 1972. ### When does this patent expire? This patent has expired and is now in the public domain — anyone can use the invention freely. ### What is patent US 3659285 cited by? This patent has been cited by 44 later patents that build on its ideas. ### What problem does this patent solve? This patent is the foundational legal document of the video game industry. It protected the technology behind the Magnavox Odyssey, the world's first commercial home video game console. Magnavox and Sanders Associates successfully used this patent in lawsuits against Atari, Coleco, and Nintendo, securing over one hundred million dollars in licensing fees and establishing the legal boundaries of interactive television software. ### What does this patent NOT cover? Does not cover digital game systems that use microprocessors, software code, or pixel framebuffers to render graphics. **Full plain-English explainer:** https://patentbrief.org/patent/us/3659285/video-game-console-magnavox **Original patent:** https://patents.google.com/patent/US3659285 --- _Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._ ## Related patents Semantically similar inventions in the PatentBrief corpus: - [How Wozniak Made the Apple II Display Color Graphics](https://patentbrief.org/patent/us/4136359/apple-ii-personal-computer) — Steve Wozniak's 1977 patent for a circuit that allowed a home computer to display stable, sharp color graphics on a standard television screen. - [How Early Television Systems Isolated Specific Colors for Special Effects](https://patentbrief.org/patent/us/3678182/chroma-key-green-screen) — A 1971 circuit design that allowed television equipment to detect a specific color in a video signal, enabling the green-screen effects we see in modern weather forecasts and movies. - [How the Classic Operation Board Game Works](https://patentbrief.org/patent/us/3333846/operation-game-electric-probe) — A 1967 patent for an electronic game where a player uses a conductive probe to navigate a path without touching the sides, triggering a signal if they fail. - [How the Game Twister Works](https://patentbrief.org/patent/us/3454279/twister-game) — A 1966 patent for a floor-based game where players use their own bodies as game pieces on a mat with colored circles. - [How the First Wireless Television Remote Control Works](https://patentbrief.org/patent/us/2817025/tv-remote-control-adler-zenith) — Robert Adler's 1957 invention of the Space Command remote, which used ultrasonic sound waves to control television functions without wires or batteries.