|
US1813365A
|
|
Acetylated disazo compound
|
|
US1793028A
|
|
Methylene-diguaiacol derivative
|
|
US1743636A
|
|
Methylene-disalicylic acid derivative
|
|
US1743632A
|
|
Methylene-disalicylic acid derivative
|
|
US1793027A
|
|
Methylene-diguaiacol derivative
|
|
US1743635A
|
|
Methylene-disalicylic acid derivative
|
|
US1743633A
|
|
Methylene-disalicylic acid derivative
|
|
US1743634A
|
|
Methylene-disalicylic acid derivative
|
|
US1743630A
|
|
Methylene-disalicylic acid derivative
|
|
US1743631A
|
|
Methylene-disalicylic acid derivative
|
|
US1764036A
|
|
Methylene-disalicylic-acid derivative
|
|
US1764035A
|
|
Methylene-disalicylic-acid derivative
|
|
US1689696A
|
|
Ester of salicylic acid and pyruvic acid
|
|
US1813364A
|
|
Condensation product of the diethyl ester of methelene-disalicylic acid-di(p-amino benzyl ether) with pyruvic acid
|
