Dear Friends, in this thread you made "all in one".:)
So,
Friedmann & Lauterjung, the importer firm from NY, 1864-1909. The owners J.Christopher Friedmann and Charles R.Lauterjung. Trademark "Electric". The Electric Cutlery Co. was incorporated in 1889, as a separate firm.
http://manah.strazors.com/electric_logo_1.jpg
Lauterjung & Sohn, Puma-Werk, Solingen, 1876-present days; registered 26th May 1900.
http://manah.strazors.com/puma_logo_1.jpg
Lauterjung & Companie, Tiger Stahlwaren- und Waffenfabrik, Solingen, 1873-present days; registered 10th May 1900.
http://manah.strazors.com/tiger_logo_1.jpg