...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 5770738 | Esters of bi- and tricyclic amino alcohols, their preparation and their use in pharmaceutical compositions The new compounds of formula A--O--CO--Z (I) (wherein A and Z are defined as explained in the specification) can be prepared by conventional methods; they are suitable as active substances for pharmaceutical compo... | 06/23/1998 |
| 5654314 | Esters of bi- and tricyclic amino alcohols and their use in pharmaceutical compositions The new compounds of formula A--O--CO--Z (I) (wherein A and Z are defined as explained in the specification) can be prepared by conventional methods; they are suitable as active substances for pharmaceutical compo... | 08/05/1997 |
| 4783534 | N-alkylnorscopines and acid addition salts thereof The invention relates to novel N-alkylnorscopines wherein the alkyl group may have 2 to 10 carbon atoms, which are useful in the preparation of valuable pharmaceutical compositions. These compounds may be prepared from the corresponding N-alkylnorscopolam... | 11/08/1988 |
| 4755603 | Process for the preparation of norscopine Norscopine is prepared from norscopolamine by hydrogenation cleavage with a complex hydride in an inert solvent at room temperature.... | 07/05/1988 |
| 4549021 | N-(ଲ-Fluoroethyl)-nortropine The compound of the formula ##STR1## and acid addition salts thereof. The compounds are useful as intermediates for the preparation of N-(ଲ-fluoroethyl)-nortropine benzilate.... | 10/22/1985 |