Roofing shingle

Claim 1

AN INTERLOCKING SHINGLE ASSEMBLY COMPRISING: A STARTER STRIP HAVING AN OVERLAPPING UPPER MARGIN AND AN UNDERLAPPING LOWER MARGIN, SAID LOWER MARGIN BEING ADAPTED TO BE SECURED TO THE LOWER EDGE OF THE ROOF OF A DWELLING, A SECOND SHINGLE HAVING AN UNDERLAPPING LOWER MARGIN AND AN OVERLAPPING UPPER MARGIN, THE LOWER MARGIN OF SAID SECOND SHINGLE OVERLAPPING THE LOWER MARGIN OF SAID STARTER STRIP SHINGLE, RECESSES FORMED IN THE LOWER MARGIN OF SAID SECOND SHINGLE AT SPACED LOCATIONS TO FORM A REGULAR PATTERN, EACH RECESS HAVING AN UPPER EDGE THAT IS PARALLEL TO THE UPPER AND LOWER MARGIN, AND A THIRD SHINGLE HAVING A SHAPE THAT IS SIMILAR TO THE SHAPE OF SAID SECOND SHINGLE, SAID THIRD SHINGLE BEING STAGGERED WITH RESPECT TO SAID SECOND SHINGLE SO THAT IT IS DISPLACED RELATIVE TO SAID SECOND SHINGLE IN THE DIRECTION OF THE UPPER AND LOWER MARGINS, THE LOWER MARGIN OF SAID THIRD SINGLE UNDERLAPPING THE UPPER MARGIN OF SAID STARTER STRIP SHINGLE AND THE UPPER EDGE OF THE RECESSES OF SAID SECOND SHINGLE TO FORM AN INTERLOCKED ASSEMBLY, FASTENING MEANS FOR SECURING SAID SHINGLES TO A ROOF UNDERSTRUCTURE AT A LOCATION BETWEEN THE UPPER MARGIN THEREOF AND THE UPPER EDGE OF THE RECESSES THEREOF WHEREBY THE NEXT SUCCEEDING SHINGLE WILL OVERLIE THE FASTENING MEANS THAT IS EMPLOYED.