Who Invented Barcode ? (History of Barcodes)

From a 1932 punched-card thought experiment to the first scanned pack of gum in 1974, the barcode's path to becoming a global standard spanned four decades of invention, patents, and industry cooperation.

In 1932, an ambitious project was conducted by a small group of students headed by Wallace Flint at the Harvard University Graduate School of Business Administration. The project proposed that customers select desired merchandise from a catalog by removing corresponding punched cards from the catalog. These punched cards were then handed to a checker who placed the cards into a reader. The system then pulled the merchandise automatically from the storeroom and delivered it to the checkout counter. A complete customer bill was produced and inventory records were updated.

Modern bar code began in 1948. Bernard Silver, a graduate student at Drexel Institute of Technology in Philadelphia, overheard the president of a local food chain asking one of the deans to undertake research to develop a system to automatically read product information during checkout. Silver told his friend Norman Joseph Woodland about the food chain president's request. Woodland was a twenty- seven-year-old graduate student and teacher at Drexel. The problem fascinated Woodland, and he began to work on it.

Woodland's first idea used patterns of ink that would glow under ultraviolet light. Woodland and Silver built a device which worked, but the system had problems with ink instability and it was expensive to print the patterns. Woodland was still convinced they had a workable idea. He took some stock market earnings, quit his teaching job at Drexel, and moved to his grandfather's Florida apartment to have more time to work on the problem.

On October 20, 1949, Woodland and Silver filed a patent application titled "Classifying Apparatus and Method." The inventors described their invention as relating "to the art of article classification... through the medium of identifying patterns".

Most bar code histories state that the Woodland and Silver bar code was a "bull's eye" symbol, made up of a series of concentric circles. While Woodland and Silver did describe such a symbol, the basic symbology was described as a straight line pattern quite similar to present-day 1D bar code.

The symbology was made up of a pattern of four white lines on a dark background. The first line was a datum line, and the positions of the remaining three lines were fixed with respect to the first line. The information was coded by the presence or absence of one or more of the lines. This allowed 7 different classifications of articles. However, the inventors noted that if more lines were added, more classifications could be coded. With 10 lines, 1023 classifications could be coded.

The Woodland and Silver patent application was issued October 7, 1952 as US Patent 2,612,994.

In 1962, Silver died at age thirty-eight, before having seen the commercial use of bar code. Woodland was awarded the 1992 National Medal of Technology by President Bush. Neither man made much money on the idea that started a billion-dollar business.

Bar code was not commercialized until 1966. The National Association of Food Chains (NAFC) put out a call to equipment manufacturers for systems that would speed up the checkout process. In 1967, RCA installed one of the first scanning systems at a Kroger store in Cincinnati. The product codes were represented by "bull's-eye barcodes," a set of concentric circular bars and spaces of varying widths. These barcodes were not pre-printed on the item's packaging, but were labels put on the items by Kroger employees. There were problems with the RCA/Kroger code, however. It was recognized that the industry would have to agree on a standard coding scheme open to all equipment manufacturers and adopted by all food producers and dealers.

In 1969, the NAFC asked Logicon, Inc. to develop a proposal for an industry-wide bar code system. The result was Parts 1 and 2 of the Universal Grocery Products Identification Code (UGPIC) in the summer of 1970. Based on the recommendations of the Logicon report, the U.S. Supermarket Ad Hoc Committee on a Uniform Grocery Product Code was formed. Three years later, the Committee recommended the adoption of the UPC symbol set still used in the USA today. It was submitted by IBM and developed by George Laurer, whose work was an outgrowth of the idea of Woodland and Silver. Woodland was an employee at IBM at the time.

In June 1974, one of the first UPC scanners, made by NCR Corp. (then called National Cash Register Co), was installed at Marsh's supermarket in Troy, Ohio. On June 26, 1974, the first product with a bar code was scanned at a check-out counter. It was a 10-pack of Wrigley's Juicy Fruit chewing gum. The pack of gum wasn't specially designated to be the first scanned product; it just happened to be the first item lifted from the cart by a shopper whose name is long since lost to history. Today, the pack of gum is on display at the Smithsonian Institution's National Museum of American History.

The first attempt at an industrial application of automatic identification began in the late 1950s with the Association of American Railroads. In 1967, the Association adopted an optical bar code. Car labeling and scanner installation began on October 10, 1967. It took seven years before 95% of the fleet was labeled. For many reasons, the system simply did not work and was abandoned in the late 1970s.

The event that really brought bar codes into industrial applications occurred on September 1, 1981, when the United States Department of Defense adopted Code 39 for marking all products sold to the United States military.