Patent ID: 11929843
Assignee: SAMSUNG SDS CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. The device of claim 5, wherein the instructions are further configured to cause the one or more processors to: receive, from the server, a second chat history, the second chat history including previous chats of the chat room, wherein each previous chat of the second chat history includes a historical chat transmission time of the chat, a user ID, and a chat content, and wherein the previous chats are included in the second chat history based on having respective historical chat transmission times that are after a second retrieval start point that differs from the retrieval start point, the second retrieval start point being a time controlling which previous chats of the chat room the third user is able to retrieve based on the historical chat transmission times of the previous chats; and cause a third device operated by the third user to display the received second chat history in a chat window of the third device, wherein the chat-invitation message further includes an ID of the third user, and wherein the second previous-message time-amount is a time amount according to which the second retrieval start point is to be determined by default.