L.L. Knickerbocker Co. Inc.: The Rancho Santa Margarita marketer of celebrity-supported products via televised home shopping reported 1994 profit of $725,244, or 51 cents a share, contrasted with a net loss of $102,516, or 7 cents a share, in 1993. Revenue rose to $7.8 million from $5.2 million. Profit for the fourth quarter more than doubled, to $366,330, or 26 cents a share, from $167,755, or 12 cents a share, for the 1993 fourth quarter. Revenue grew to $2.2 million from $2.1 million. The company announced last week that it had completed its initial public offering.