Guide to patents, trade marks and designs
Subtitle: by Oscar Carlberg.
Publisher: Singer, Ehlert, Stern & Carlberg
Published: 1947
Place of publication: Chicago; New York [etc.]
Language: eng
Subjects: Patent laws and legislation; Trademarks.; Design protection.
Notes: Loose-leaf.
To be kept up to date by the insertion of correction sheets. cf. Foreword.