Martti Talvela. The expertise of B&K, especially relating to taxation, is recommended to the world-famous Finnish opera singer Martti Talvela (1935 - 1989). Kullervo Kemppinen takes care of his legal issues and B&K serves Mr Talvela until he passes away in 1989.

The Finnish National Opera. In 1971, Kullervo Kemppinen is officially appointed as the secretary to the board of the Finnish National Opera. The Opera has been client to the firm ever since the 1920s.

Hannu Taanila. Jukka Kemppinen defends journalist Hannu Taanila who is accused of disgracing the police of Oulu in a case relating to the police having used unnecessary violence. Hannu Taanila is acquitted of all charges.

Construction companies. Kullervo Kemppinen founds a total of 60 apartment owner’s organisations in Vantaa and represents A. Puolimatka Oy, Laaturakenne Oy and one of the major banks in Finland, Suur-Helsingin Osuuspankki.