Zip Loc Bags #221
It all started in 1951, a company called Flexigrip, Inc. was formed to develop and market the plastic zipper, by the same name, based on a set of patents, which it had purchased, invented by Borge Madsen.[3] The initial products for the Flexigrip and other plastic zippers (such as the sliders zippers (topsite) that were developed by Flexigrip) were looseleaf binder inserts and flat briefcases. Thereafter, the marketing efforts were directed at packaging products in plastic zipper bags, which turned out to be the principal market for the Flexigrip, Inc. products. In 1961, Flexigrip, Inc. obtained from a Japanese company, Seisan Nippon Sha, who invented the Minigrip-type plastic zipper bag, exclusive manufacturing and selling rights for the United States, based on a series of plastic zipper Seisan patents. A company by the same name was formed to produce and market Minigrip bags. In or about 1964, Minigrip, Inc. negotiated an exclusive license for the grocery trade (supermarkets) with Dow Chemical Company for the Minigrip product. It turned out to be enormously successful. Seal a meal Bags
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