Complex sentence: Victor Mayers daughter Maria Mohr and her husband Edmund Mohr took over the business from the founder in 1925 until in 1974 Victor Mayers grand sons Dr. Herbert Mohr-Mayer and Hubert Mayer inherited the company.
Split into simpler sentences: Victor Mayers daughter Maria Mohr and her husband Edmund Mohr took over the business from the founder around 1925. In 1974 Victor Mayers grand sons Dr. Herbert Mohr-Mayer and Hubert Mayer inherited the company.