See an example, one person claimed three patents but he worked only one:
1. Iqbal, M.; Evans, P; Roberts, S. M. Synthetic Methods and Novel Chemical Compounds, US Patent, 2005, No. US2005107477 A1.
2. Iqbal, M.; Evans, P; Roberts, S. M. New Synthetic Methods and Novel Chemical Compounds, Australian Patent, 2003, No. AU2003217021 A1.
3. Iqbal, M.; Evans, P; Roberts, S. M. New Synthetic Methods and Novel Chemical Compounds British Patent, 2002, No. GB0207028D D0.