...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4067773 | Enzyme-containing article for removing paper adhered to a surface A two component article of manufacture useful for removing paper adhered to a surface with a starch-based adhesive comprising a sealed moisture-proof first package containing an enzyme composition comprising either a carbohydrase or a carbohydrase and a p... | 01/10/1978 |
| 4038141 | Methods for extracting and purifying kallidinogenase A method for extracting and collecting kallidinogenase (EC 3.4.4.21 substance) which comprises extracting the pancreas of a mammal with water in the presence of a salt at a temperature of about 45° to about 60° C. and a pH of about 5 to about 8, wherein... | 07/26/1977 |
| 3994782 | Methods for extracting and purifying kallidinogenase A method for extracting and collecting kallidinogenase (EC 3.4.4.21 substance) which comprises extracting the pancreas of a mammal with water in the presence of a salt at a temperature of about 45° to about 60° C. and a pH of about 5 to about 8, wherein... | 11/30/1976 |
| 3950221 | Process for improving the quality of microbial rennet A process for improving the quality of microbial rennet by inactivating cellulase impurities in microbial rennet which comprises heat-treating microbial rennet in an aqueous medium in the presence of sodium chloride.... | 04/13/1976 |