in General Knowledge, History Before alarm clocks were invented, there were ,knocker-ups… by Web Desk September 21, 2016, 3:47 pm 37 Views Before alarm clocks were invented, there were ,knocker-ups, who went tapping on client’s windows with long sticks until they were awake. Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website By using this form you agree with the storage and handling of your data by this website. *