This book is constructed to last with a plastic spiral binding, acid-free paper, and a tough, laminated cover. This is, after all, our source for the patents that we map. WAGNER, WARD, WARDWELL, WARINER, WASEY, WATKINS, WEAVER, WEBSTER, WELCH, WELDON, WHITE, WICKS, WILBUR, WILKE, WILKINSON, WILLETT, WILLETTE, WILLIAMS, WILSON, WINN, WINTERS, WINTON, WITHERBEE, WOOD, WOODRUFF, WRENCH, WRIGHT, WUNDERLICH.