If a patent officer denies a patent, the patentee can resubmit the patent. Then by procedure other patent officer needs to review the application. They do this

If a patent officer denies a patent, the patentee can resubmit the patent. Then by procedure other patent officer needs to review the application. They do this ad infinitum until they get their patent granted. It's a denial of service attack. The service here being "skilled employees" and the denial being "we annoyed the organization into submission". This is how most ridiculous, say Red Digital Camera's, patents get granted.