Format: in text citation
There have been developments in the ways that cleaning heads have been designed (Inventor surname, Year).
Format: reference
Inventor surname, initials. (Year) Title. Authorising organisation. Patent number [online]. Available at: URL [Accessed date].
Example: in text citation
There have been developments in the ways that cleaning heads have been designed (Allard, Dyson & Spaven, 2006).
Example: reference
Allard, R.J.W., Dyson, J. and Spaven, J.W. (2006) A Cleaning Head. UK Patent Office. Patent no. GB2402047B [online]. Available at: https://worldwide.espacenet.com/patent/search/family/009958926/publication/GB2402047B?q=ia%20%3D%20%22allard%22%20AND%20ti%20%3D%20%22a%20cleaning%20head%22 [Accessed 10 December 2019].