Griffith Hack Patent and Trade Mark Attorneys and Lawyers can trace its roots back more than a century to two of the oldest patent attorney firms in Australia.

The national firm Griffith Hack & Co was created from the merger in 1988 of Griffith Hassel & Frazer in Sydney and Clement Hack & Co in Melbourne. Griffith Hack & Co then established patent attorney practices in Perth and Brisbane, and associated legal practices in Melbourne and Sydney. The firm's name was shortened to Griffith Hack in 1997.

Griffith Hassel & Frazer

Irish immigrant Arthur Griffith (born 1861) founded Arthur Griffith & Co in Sydney in 1895, practising as a patent attorney and consulting engineer. He became a member of the New South Wales Parliament, and was responsible for a Private Member's Bill which became law as the Patents and Trade Marks Act 1897 (NSW). He was Minister of Public Works from 1910, and the NSW town of Griffith was named in his honour. He was President of the Institute of Patent Attorneys of Australia in 1929 - 1930.

The firm's name changed to Griffith & Hassel when Charles Hassel joined Arthur Griffith in about 1908. It later became Griffith Hassel & Griffith when Griffith's son , Sturt de Burgh Griffith, was admitted to the partnership in 1930. Sturt de Burgh Griffith served as President of the Institute in 1947-1948. The firm was purchased in 1949 by Dr. George Frazer, a Chartered Patent Agent from London, and the firm's name was changed to Griffith Hassel & Frazer in 1950.

Clement Hack & Co

Clement Hack (born Adelaide 1877) established the firm Clement A. Hack in 1904, having been registered as a patent attorney under the Patents Act 1903 (Commonwealth). He was a foundation Fellow of the Institute of Patent Attorneys of Australia in 1918, and served as its President from 1924 to 1926.

The firm became Clement Hack & Son, Ashton & White in 1936, William Ashton, Ronald White and Clement Hack's son, Barton, having joined in the intervening years. William Ashton was also a foundation Fellow of the Institute, and was its President in 1939-1940. Ronald White served two terms as President , in 1941-2 and 1959-1960, while Barton Hack was President from 1949 to 1951. Barton's sixty years of service as a Fellow were marked in 1994 by his election as an Honorary Member of the Institute. The firm changed its name to Clement Hack & Co in 1946.