![This Day in Patent History - On January 23, 1849, a patent was granted for an envelope-making machine, greatly reducing the time needed for the mass production of envelopes - Patent Yogi LLC This Day in Patent History - On January 23, 1849, a patent was granted for an envelope-making machine, greatly reducing the time needed for the mass production of envelopes - Patent Yogi LLC](https://patentyogi.com/wp-content/uploads/2015/01/PatentYogi_On-January-23-1849-a-patent-was-granted-for-an-envelope-making-machine-greatly-reducing-the-time-needed-for-the-mass-production-of-envelopes.jpg)
This Day in Patent History - On January 23, 1849, a patent was granted for an envelope-making machine, greatly reducing the time needed for the mass production of envelopes - Patent Yogi LLC
![Interested in HP-250D Full Automatic Pocket Envelope Making Machine ? Choose Shanghai PrintYoung International Industry Co., Ltd HP-250D Full Automati Interested in HP-250D Full Automatic Pocket Envelope Making Machine ? Choose Shanghai PrintYoung International Industry Co., Ltd HP-250D Full Automati](https://resourcewebsite.singoo.cc/14971743336767342/en/image/5d1472d3b8c82.jpg)
Interested in HP-250D Full Automatic Pocket Envelope Making Machine ? Choose Shanghai PrintYoung International Industry Co., Ltd HP-250D Full Automati
![Best Seller HP-250C-PS Full Automatic Peel-seal Pocket Envelope Making Machine Supplier | Shanghai PrintYoung International Industry Co., Ltd Best Seller HP-250C-PS Full Automatic Peel-seal Pocket Envelope Making Machine Supplier | Shanghai PrintYoung International Industry Co., Ltd](https://resourcewebsite.singoo.cc/14971743336767342/en/image/5c259aef9163e.jpg)
Best Seller HP-250C-PS Full Automatic Peel-seal Pocket Envelope Making Machine Supplier | Shanghai PrintYoung International Industry Co., Ltd
![Eyd-296c Automatic Pocket and Wallet Type Envelope Making Machine - China Envelope Making Machine and Pocket & Wallet Envelope Making Machine Eyd-296c Automatic Pocket and Wallet Type Envelope Making Machine - China Envelope Making Machine and Pocket & Wallet Envelope Making Machine](https://image.made-in-china.com/2f0j00lFWayEbRCCzO/Eyd-296c-Automatic-Pocket-and-Wallet-Type-Envelope-Making-Machine.jpg)