Creation of inventions, utility models or industrial designs For inventions, the amount of remuneration must be 30% of the employee's average monthly wage over the previous 12 months. For models or designs, the amount of remuneration must be 20% of the employee's average monthly wage over the previous 12 months. Payment must be made within two months of the patent grant or the employer's decision to keep the information secret. If the patent was not granted because of circumstances under the employer's control, payment must be made within 18 months of the filing date. Employers' use of employees' inventions The remuneration must be three times the employee's average monthly wage over the previous 12 months during which the invention has been used.