[Trade Journal]
Publication: Western Electrician
Chicago, IL, United States
vol. 7, no. 22, p. 302, col. 3
Business Mention.
·
·
The Knapp Electrical Works of Chicago have just issued their new catalogue for 1890, which they will be pleased to mail to applicants. The company has just brought out a new annunciator of an improved type.
·
·
